I've spent a lot of sweaty hours here at this place, and as far as gyms go in Paris, it's pretty…read moregood. For Paris, it's a decent value for the money especially if you have an employer who offers discount certificates.
They have a lot of exercise classes and a few free weights. If you go after work or during the weekends, it's pretty crowded. You'll see the same faces again and again -- there are some pretty serious weight lifters here.