Not only a gym, but everything your body needs to be fit can be found here.
A pleasingly clean swimming pool (with a sauna) with water at just the temperature you like. The bathrooms are also very clean (very important!) and a hair dryer is always available for free. In the fitness centre you can find all those strange machines which supposedly benefit your body if you know how to use them.
An aerobics or P class? No problem. A couple of visits and you are a new person!
Axa Gym, Na Poříčí 40/1051 Praha 1 – Nové Město, firstname.lastname@example.org Telefon: +420 224 815 968, +420 224 829 083, www.axagym.cz