I was advised by a local to try Octopus between 4-8pm. I got there around 6pm on a Saturday; and I’d estimate there were 30 guys. Most of the guys were fat bears, which is not my flavor, but there were enough otters and handsome, interesting not-fat dudes (which I would consider myself to be) to keep my attention for a couple of hours. Plenty of fun, and I felt welcome. Everyone seemed friendly and a few guys were chatty. Age range was 30+. The large pool was clean, bright, and a not-too-hot temp. The dry (Finnish) sauna was a pleasant level of hot to allow long visits without overheating too quickly, and the steam room was steamy. The private cabins on the lower level warmed up too fast with a door closed, upstairs seemed cooler. The facility was very clean and there was a staff member continually circling and cleaning (but never obtrusive). Arrival is easy—you pay a self-service machine and give your receipt to the attendant who provides a towel and quality sandals, and a locker key (lockers were simple and worked great). No fussing with registration or IDs. For 17 euros, I felt it was exceptionally good value.

The best sauna in Madrid steaming hot room with heavy pressure water jets and clean showers with lots of rest areas and lounge with TV and WiFi and polite staff cheapish after 8pm good value.

Went there on Sunday....not so clean and crowd was 50+...i guess bear here means very fat. Worse spent 16€

Visited it in January 2017 . It's not dirty, but it's not as clean as other saunas. Lots of action.

I found it OK lots of action had good time In steam room and an out of this world time on the sling.

Really nice sauna with more chubby hot guys. Clean with a big jacuzzy. Had a lot of hot moments....

Went there last week and enjoyed it! Facilities are large and clean! Jacuzzi pool is very nice! Steam room and Sauna are clean and big! Diverse group of guys there of all ages! Had a good time!