I mean, did she use a comb to get one, or did she get it there in a way similar to salting the rim of a margarita glass, or did she borrow one from another dancer. 

And I can imagine a conversation back in the kitchen that went something like this...

Dancer/Waitress - "Yes, those assholes at table four are horrible tippers and they aren't buying lap dances or anything else and just drinking the minimums. Especially that one guy - he's been nursing that Coke for an hour."

Dancer Two - "Oh, shit, I bet those pricks are cops.  They never tip well or go back to the Champagne Room."

Dancer/Waitress - "I wonder if I should spit in one of their drinks."

Dancer Two - "Nah, don't do that - spit floats and they'll see it and complain. Try putting a pubic hair in that guy's glass.  And if he complains, we can always tell the boss it was purely an accident and by chance."

Dancer/Waitress - "I'll put it on the rim. Then we can stand back and watch when he takes a drink and laugh our asses off.  And if they get pissed and leave so what?  The bastards aren't spreading their cash anyway."

I know, I know.  Such an immature post, but you know, man, maybe a nice respite.  Or maybe not.