go to Negril
Only have a few observations from a distance, no direct experience...
I visited Negril and saw many hand written signs advertising hot girls - looked like all from the same agency.
I also saw several men with unmistakable companions, (at least to the trained eye
) Very young and pretty.
I didn't talk with the girls since they were obviously busy, but saw them frequently having dinner with their new friends at the local restaurants in the early evening.
When I was walking on the beach with my boyfriend I was mistaken by some of the locals as his paid companion - I'm black, he's older than me and white. The locals seemed completely non-judgmental about that in Negril.
I have no idea of the scene in Kingston. Maybe the strip club at the Quad in New Kingston might be a start.