If you need the location of the bath houses, you can try Utopia website.

Based on my last few visits to the various bath-house, I hardly noticed any GWM in the bath-houses. You may be disappointed if you are going there to look for GWM.

However, noted that some of the GWM will patronise the discos and you may be lucky if you try to visit some of the discos during Fri or Sat night.

Great luck in your search.