It seems everybody's reply has been that this dancer's offer was too good to be true. But what if she was for real? I still wouldn't go along with it.
If I've just arrived at my favorite club, I'm there to have at least 2 or 3 hours of fun in the club. I'm looking forward to spending time with a few different girls - some new, some favorites - flirting, petting, getting dances. I only make it to a club maybe once or twice a month, and I've driven at least an hour to get there, so I'm not about to give all that up on a whim. Not for sex with a stripper who looks "not to bad overall". I can do better than that without leaving town.
What I might do is give the same answer as when a good looking girl asks "wannadance?" I tell her, "I'm in no hurry." In that case, sometimes she sticks around long enough to persuade me she's worth a try. With this girl, if she turns out to be a keeper, I might be up for something at the end of my visit, but not before then.