There was coffee shop in Central station in Prague in 90's. About half of "inhabitants" were working boys. Most of them were homeless boys from another countries like Slovakia, Ukraine or rural areas of Czech Rep. Cheap and fast sex was easy reachable and price sometimes was hamburger from McDonalds.
STD were common there as well, drugs using too. Most of them were "gay for pay" - i.e. straight boys who sell asses for money because of been jobless. They used that location as "a hiring point" because in about 150 meters was located hostel for homeless. So at late evening "unlucky" boys without clients went to spend night in that hostel for to came to coffee shop at next afternoon for to hunt for clients again.