Oh man...after a Radiohead show I was getting a backrub from a drunk chick that was WAY out of my league, and a guy I went to the show with starts BEGGING for a backrub from the lady! Some people are lame and can't stand someone else getting something they want.
You're not looking for a keeper at the club, are you? Cause I don't think I would ever try to do anything more than flirt and have fun with any ladies I met at a club. Too impersonal. If you're looking for more at the club you might have to throw your pearls before swine a few times before you meet someone worthwhile.