A stripper you've never met sits down with you. You end up having a long conversation about, I dunno, some modern choreographer you both like. You buy a couple of dances so she doesn't feel like her time's been ripped off. But then she keeps talking to you. Later in the night, she comes back a few times, just to talk, as a break.
You keep doing this for several weeks or even months. Getting to know each other better and better over time. And meanwhile, the dances are getting closer, too. (We're assuming no in-club extras.)
Chances are, that girl will do OTC NP4P with you.
Again, what's hard about this?