Nope, sorry but putting him on the balcony did not teach him anything except that his people are suddenly very scary and they left him out there to be lonely and afraid.

First thing you need to do is determine why he is peeing.
And the first step to that is to take him to the vet to see if he has a health issue, such as a urinary tract infection or diabetes or some other problem.

Meanwhile quit with the spanking and that sort of thing. Understand that your dog is somewhat nervous and by hitting him, he becomes more fearful and loses his trust in you. To him you are a giant, and when you hit him he can be extremely afraid. Fear leads to behaviors you don't want, including growling, biting and even nervous pee-marking.

As far as his reaction to other people, please understand that his aggression is because he is afraid. So again, any scolding or punishing will only increase his fear of having people over, because not only is he afraid of other humans, but his own humans get inexplicably aggressive when others come over.

Stick around here a bit and read some of the training and behavior threads. You can learn a lot and figure out how to help your little guy.

Two more tips.
One, if your guy is not neutered, get that done.
Two, get a belly band for him. This prevents indoor peeing and can aid in the re-training process you are going to need to do.

And a final word, ALWAYS be kind and gentle with your dog. Nothing good comes out of spanking or even harsh verbal corrections. What you get with punishment is a fearful dog, which again leads to more problem behaviors than you might have solved. Instead, learn how to train For the behaviors you want, to prevent the ones you don't want. We can help you with that!

 

First, stop spanking and punishing your dog. He doesn't know eliminating in the house is wrong; dogs don't have the ability to reason that way. All you're accomplishing is making him more nervous and stressed - which can, and in his case may have, lead to increased accidents.

Second, take him to a vet to rule out a UTI. If he has an infection, he can't hold his urine. Punishment won't help. Clean any spots where he's eliminated with an enzymatic cleaner to completely eliminate odors.

Louis sounds like a nervous pup. When he eliminates around guests, it's likely what's called submissive urination and it's not something he can control. That won't stop unless he starts to feel more comfortable around people. You need to build his confidence and counter-condition him to the presence of strangers. You might find these resources helpful: fearful dogs and Help Your Shy Dog Gain Confidence, also, search for "Kikopup shy dog" and you should find some excellent video instructions.

Basically, you want your dog to associate people with good things - hot dogs, chicken, cheese, tug games, or whatever he loves. Right now, it sounds as though he's scared of strangers, he eliminates involuntarily, and then you punish him making strangers even more scary, so he continues to eliminate, and the cycle continues.

How often is he taken out to eliminate? He may simply need to go more often. My dog goes 5-6 times a day.

 

Great advice form Tess and Cookieface!

Here's a link that have very good housetraining instructions, http://www.dogforum.com/housetraining/house-training-how-tos-2135/

If nothing else please understand that correcting him for pottying on your carpet is going to make it worse not better. By doing that you are teaching him that pottying in front of you is unsafe but you are not teaching him what you want him to do. What will start happening is he will start sneaking off to pee where you cannot see him, and he will hold it when you are around. Holding it when you are around will make it very difficult to teach him where to potty.

 

I think @kelly528 (correct me if I'm wrong) said this in another thread, but it's more a matter of teaching your dog where to go not teaching him where not to go.
Have you considered taking him out to pee before company arrives? It may not help in the case of a submissive peer, but if he simply just has to go and can't seem to hold it when company is over, then that might solve some of your issues.
I always try to make sure Merlin has peed before company comes in to my apartment because he gets so excited and there's no telling if he might just let it loose (he's also still a puppy at almost 5 months old).

 

…Did someone say poms?!

Some would say that they're notoriously hard to housetrain. We had a lot of issues with Toby in the first year. We tried everything in the books and even sought out experienced pom owners at dog shows… and it happens that a lot of them hadn't managed to housetrain their guys; they were helping them in and out of diapers between runs in the ring!!!

To say the least, we were horrified. We didn't know what to do, until my mom read about the Potty-Bell in a pomeranian bookmag (or whatever they call those things). And you know what? It worked straightaway. Poms are very smart and intuitive dogs, but sometimes we forget that they are very small and we don't always notice them while them are hanging around by the door, legs squeezed together, waiting for someone to notice them and let them pee already. Try this with your guy. By the sounds of it, he'll pick it up no problem.

Don't shame or spank or punish them in any way for peeing in the house. The only thing this really does is create the stealth pottier, the dog that has learned that humans hate it when he goes potty in their presence. This makes cleaning up messes a scavenger hunt, and coaxing our dog to go on potty-trips difficult. Dogs have no idea where to go; they simply go in the spot that feels 'luckiest' to them. If you are teaching them the hard way it will be hard for both of you because he has to guess at what he did wrong: Was it peeing in front of you? Going on the carpet? Does that mean that the bed is fair game?

You can spend all day teaching your dog 'Don't pee on this chair', 'Don't pee on this carpet', 'Don't pee on hardwood' and so-on, and so forth… But the easiest thing to teach him is 'Pee on the grass!'

[[And as a side-note. I would save my money the UTI check unless this problem recurs. The one huge pee on the floor is from a dog that has no problem holding it; his bladder was simply at max capacity. I can almost guarantee you that you were too engrossed in the movie, and forgot to take him out to pee. I'm guilty of that myself.]]

Now, the barking at guests...

This really is a pomeranian (among other breeds) thing IMO and unless he's snarling and snapping (which he might be doing if he's been scolded for barking) it's not aggression. Poms really like people and they really get excited about guests. A pom that won't shut up at the door is not trying to scare anyone, he is going… "DAD! DAAAD! LOOKIT! LOOKIT LOOKIT LOOKIT! WE HAVE VISITORS!!! DO YOU SEE 'EM? DO YOU SEE 'EM?! DAAAD!"

They are dogs bred to be social and companionable, and so they really like to alert-bark, just as their ancestors (DOGS, not wolves) would do to alert their buddies that they have company. He's not out to scare anyone or make you embarrassed, he's genuinely trying to do you a doggy favour. This instinct is pretty strong in all the poms/toy spitz that I have met and in the opinion of a lot of owners… not worth battling! They just love to make a hullabaloo. What really seems to be tried and true is to acknowledge your dog with something like "Yes, we see them Jimmy, good job. Now quiet."

Quiet, if your dog doesn't already know it, is a really useful command for a yappy breed. To teach it, you must first teach your dog how to speak on command. But so as not to overwhelm you, I'll leave that for another day!

Shy of other dogs

If he's been attacked by another dog, I don't blame him for this one a single bit! Toby has been in the same boat and it took him years of practice, and well-informed training to get him over his fear of large dogs. But really, there is no reason for a dog as small as a pomeranian to like large dogs… playing with a large dog could get them seriously injured if they are accidentally squished. It is important, however, to get him over his fear so that he is not bolting unexpectedly or acting like prey. That, again, is something I'll save for another thread if you need help.

Peeing when guests come over…

So now you know that your pom isn't the only pom in the world with a tiny bladder, or a dog that doesn't really know how to tell you that he needs to go outside to pee. And you also know that they get quite excited about guests And if you are scolding or chastising the dog, that adds even more stress to the situation. If you are raising your voice to him, he will assume that you are barking along with him. Now put these all together in the same situation… wouldn't you have to pee pretty badly too!?

I think that if you keep welcoming visitors a calm, quiet and positive experience that this one will resolve itself. My family finds it handy too to put a harness on Toby and let him trail a leash (handle cut off so he can't catch it on anything) around the house. That way if he gets too overexcited or friendly, or needs to be steered to the bathroom (because sometimes visitors are hopelessly more interesting than taking a potty-break), you can easily get ahold of him.

Lastly… Welcome to the forum! We'd love to see pictures of your guy. As many people here are agree, I think that Pomeranians are a truly great little breed and I really can't sing enough praises for them

 

Never spank a pomeranian. Never spank any breed for that matter, but never ever never spank a pomeranian. I know it can be very frustrating. If they do something to cause you to lose you temper, go in another room and count to 10 if you have to. I can even yell at mine and it may cause a sloppy stool. Very sensitive dogs and very smart.