@Cashman
Wow, the girls must really love you. Giving unsolicited 75% tips. Hope they were either extras or happy ending type dances...
I only tip in certain cases. Say i only do one, two or three very high contact, high mileage dances, but for some reason, i don't want to do more dances (she's not attractive enough, i've getting tired of her in general, etc.). I'll usually tip another dance (her cut and not the cost of the entire dance) on top of the dances, well at least in the case of 2 or 3 dances. If it's just the one, i might tip $10, otherwise $20. Most dancers keep about $20 of every $30 dance they do. If the dance(s) are just above average or pretty good, i might tip $5 or $10 for these dances.
If she does more than 3 dances, i usually consider the larger number of dances a tip in itself. I usually pay in 20s, so if the math works out that she gets $10 extra, i just give it to her. I might even do an extra dance, so she gets that $10 instead of the exact amount say with an even number of dances @ $30 each. However, if the dances are exceptional, i'll throw in another twenty or two depending on the even or odd thing, or sometimes i'll use smaller bills as well.
But if the dances are just average or worse, no tip and if she asks for a tip in those cases, she might get a dollar, but more likely she'll get a verbal "tip" on what she could do to improve her dances or what she did wrong. In the rare case that a very good dancer asks for a tip (they usually don't and when they do they usually insinuate or imply that they would appreciate anything more), i'll add one, but probably less than what i would have done otherwise.