Went to Thermas recently, and here's how it went down for me...
I went there around 8PM on a Tuesday night. There were about 11 rent boys as I was told at the entrance. When I got there, I was looking for bottom boys. Apparently, all that were left were tops. There was one guy who was versatile but he wasn't my type. One of the escorts told me that if I want bottom boys, the time frame for them is from 3PM to 7PM during weekdays. Despite being open 24 hours a day, the availability of bottom boys is limited to 4 hours on a weekday. I guess, the the demand for bottoms is low outside those hours. This leads me to believe that 99% of you who have been harping about Thermas here are bottoms.
Anyway, I wasn't too hurt by not finding a bottom that night, and I left without fucking anyone. Barcelona has a bunch of cruising clubs and saunas, and my needs and wants are thoroughly met. I'm still in Barcelona right now, but I may not pursue Thermas further during this trip because the saunas and cruise clubs here have been awesome for me! Muchas gracias España!