There are many gyms where you can go and pay just for the day. We highlight the most gay and best gym here since there are no specific gay gyms anymore in Amsterdam.

Club Splash
Perhaps the gayest gym in Amsterdam. Splash is a good place to meet gay locals and expats, but the place is quite small.
Splash has a sauna, steam room, massage facilities and coffee shop. Daily classes (Yoga, Spinning, BodyPump, etc.) are offered. Personal training and short-term subscription available.
weekday: 07:00 – 24:00
weekend: 08:00 – 21:00