It has been my experience and others', that there are NO gyms in Paris with free weights (i.e. barbells, bench presses, heavy dumbells, etc) only gyms with machines.
Where do people who are interested in bodybuilding workout?
I think you should go for workout at home Push ups are one of the first exercises everyone can easily perform. this workout is for the chest, triceps and even involve your back and shoulder muscles. Dips are alternative to developing chest and triceps muscles.
ah, since I've moved to Paris, I have discovered the very good Louvre Gym, which is well equipped with free-weights ... but not for the faint hearted or closed-minded.