you're being too passive aggressive.

First off, you're not in the best environment to have a lot of room to be making out, so you're not thinking things through and realizing they may not be doing it on purpose.

Secondly it's your responsibility to fix that situation, if that's what you want. If you want room to make out, go somewhere for that. If you want to dance, dance. If you want to do both, you're going to have to suffer the consequences that come with your choice, namely, people getting in your way. If you're not willing to handle it, don't expect it to fix itself.

Finally, being pushy with drunks isn't going to get you anywhere fast. Just because some fat guy is annoying you doesn't make it right to be aggressive with him. All you're doing is exasperating the situation, and likely fucking up some guy who's got a lot of his own issues with himself. Maybe he has game, and maybe not. maybe he's trying to be fun, or just get some friends. Maybe he is trying to make you look bad. Doesn't matter.

Suddenly you're acting like the BigDick(tm) who constantly put you down growing up, the same big dick that destroyed your self esteem, prevented you from getting girls, made you depressed for the better part of your life before you finally decided to 'Get Game' and fix this. Putting the guy in a headlock isn't doing you or him any good AT ALL.

Next time, firmly tell him to stop. If he doesn't, ridicule him. If he still doesn't, move away. It's not worth getting physical, because you can't talk sense into drunks.

Anything beyond that is just starting the cycle all over again, and going to lead you back here looking for 'help' (a place to vent your frustrations, and to seek guidance).