As for BKK here: you can still go along Screw Hot male Dreamboys to find a few and then even a new venue SOL, all in a same siz part of Patpong2.
But I see you have discovered new attractions in the latino world. The well-known other forum has a branch for that and plenty of info. From what I gather however no street full of such brothels. Quite a few colombianos also tradle EUR-they do not need visa. But so do the Brazils etc and even a few Cubano´s
Thai mostly copycat-from Japan, for how to set up etc but indeed they can often find amusing extra additions to enliven it.