Yeah - Thats on my wish list as well!
The closest I have come is at the Meat Market - where I got asked who I wanted - but it was almost like an afterthought.
Sometimes at Lucky I would get to choose from who was sitting in the front room - but it was a choice between some 40-50's or a young girl who looked about 25... Duh!
I think many of the girls can be pre-arranged by phone - but you have to know their names ahead of time.
Ive never seen a place where you can look in a room at girls lounging on couches and get to pick one.....
I bet Kal has, though.