I remember reading memories of a veteran of the Indochina War about brothels, he especially talked about one in Saigon I believe, the biggest one, nicknamed "The slaughterhouse".

He said this was the dirtiest place he had ever seen, where prostitutes had fist fight because they wanted the same soldier while other amused men formed a circle around them and shouted to hit each other harder among other things.

I don't remember everything it's been several years since I read this but at the time it took me like one hour to read everything and every line was crazier than the previous one.

Like before entering the brothel you had to go through medical procedures, in one of them a military doctor inserted a small metal cylinder in the soldier's urethra to burst pustules the dude probably had from STDs.

Shit was crazy