How many of these girls will do OTC under the right circumstances (money is right, you're easy to deal with, things are slow in the club, etc.). Which makes sense given that they are already removing their clothes and rubbing on guys for money. It's still a leap from that to full blown sex for the non-extras girls, but far less of a leap than it would be for the checkout girl at your local supermarket, lol.
The value of being approachable and easy to talk to. Part of this involves being comfortable in your own skin inside a strip club. Some guys can do that and others can't. IME giving off good energy also feeds into 1 above.
The value of not being concerned about conflict avoidance. As important as being approachable to the ones you like is learning to move along the ones you don't. Looking a girl straight in the eye and saying NO is an important skill to develop. Appearing weak or squishy, OTOH, is a good way to encourage aggressive girls to control your experience for you.
Being penny conscious, pound foolish, is a losing strategy. Unless you're just going to a club for a few lappers, like those guys who are able to prematurely ejaculate in their own pants just from a little friction, being stingy will backfire in so many ways that matter. If your clubbing budget doesn't include money to buy a few drinks for one or two dancers, tip the bartender well (which will often come back to you anyway with a better drink pour) and throw a few 20s to your favorite dancer in tips (stage or barside), then just do something else instead. A little love can go a long way in too many ways to easily discuss. 10 Years ago I would never have needed to post this, but it's insane how much grousing this new generation of dudes does over this simple stuff, to their detriment I might add.