This scene happens every damn time:

Me and the boys are enjoying ourselves on some club, when my sight reaches this lady I'd be interested on. We are both dancing with our respective groups and everybody else seems to get laid easily. It seems like a good place and moment to interact, the tone is ideal and I won't be judged by anybody but... What do I say to her?

I mean if I talk to her (which I try to always do even though I have nothing to say) I stay calmed and try to be everything but rude, but nothing crosses my mind. Does anybody know what to say on this kind of situations?