I feel like if you're in a bar after a certain hour, you stop being able to comment about typical bar behavior. I agree that dancefloor suckface-age when no one else is dancing, sure, is in poor taste. And before, say, 11pm, it's probably uncalled for. So if that was the case, I guess my face is red. But if it was later at night, well, I don't know, it's a bar. People are drinking and stupid. It happens.

Maybe Bars should have a special dance area for "Stupids", or the bar could have some type of 3D effect that blocks-out patrons of the floor. For those who want to have an early night suck-face, just dance on the "Stupids" portion of the dance floor or the bar manager can turn on the 3D block-out so his other patrons won't be annoyed or embarrassed.
All can enjoy their meal, dance with their partners have a good night, stay later than 11pm if they want and everyone will be happy. Now how's that for a solution.