I would warn the girlfriend that I wasn't willing to go out with someone who insists on dirty dancing with random guys. It's a matter of degrees, there's no right or wrong, that just represents the limits of what I'm willing to tolerate. On the other hand, I wouldn't mind if my girlfriend likes to dress up and go out clubbing, whereas some guys hate that.
Anyway, the ball's in her court then. Once I've made the boundary clear, it's up to her whether she wants to cross it or not. If she does, I'd leave the club straight away, and then I'd break up with her.
That's it TomerT, there's no magic solution. It's just a balance of what you're willing to accept and how far she's willing to limit her behaviour.
Is it burnin'? Well, f-ck, now you're learnin'.