DAMN DUDE, HE PRACTICALLY HANDED YOU A MENU!!
Kidding aside, here's what I'd say next time.
"Hey, Trouble, remember you said you could make a private session happen somehow? Does that mean you could do one outside the club?"
If you says "yes," I'd ask, "What's the best way is to reach you outside the club, so we can set one up? I'd rather not do it on Facebook."
If I got a phone #, I'd call him and THEN I'd start to ask if he does more than a lapdance. Waiting until then would avoid the indiscretion that others have been worried about.
I'll be watching this thread for an update, YBO!