Have you been reading about the raids in Bangkok on the late-night karaoke joints? It seems taking illicit drugs here is all the rage now with a certain type of tourist. Mainland Chinese I believe, they seem to like a good party just as much as the next man.
Ketamine was one drug that was mentioned recently, they mix it with water and call it Happy Drink or something. I've heard some horror stories about the Special K, wouldn't touch it with a bargepole.