Patong in Phuket is fairy tame tourist spot, ask obvious questions like how much will it cost, how much are drinks?
As for Patpong in Bkk, the upstairs ping pong bars with no names on the doors were renowned for be clip joints, may still be, I couldn’t tell you, doesn’t interest me, once you’ve seen one average old Thai woman shoot plastic balls out her fanny once it’s enough.