Strippers: Yes, this is a funny one...but some strippers actually expect you to tip em. Not a chance. The only time I'll give them extra money is if I'm in that front row, and that's because a dollar bill is an incentive to bring them over my way.
I don't frequent strip clubs, in fact I haven't been in close to ten years. Last time I went was a bachelor party, and one of the other party goers who was a "regular" at the club chastised a friend and me for having bad "ettiquitte" for just sitting back and having a few drinks and watching from a distance. I don't need to pay a woman a buck to act like she likes me. It was laughable.