Curves is an all women gym... It is like circuit training with hydrolic machines done in 30 second intervals with "recovery stations" in between each machine...30 seconds on a machine, 30 seconds jogging in place or whatever you feel like on the recovery station...for a 30 minute workout. It is a great place, I love going there! They do have nutrional supplements and protein shakes and even a diet plan you can follow if you choose...it is all outlined in the member guide... Right now my Curves is running a "Curves 6 week Challenge" which my sister is doing... She has lost 5 lbs in just about 1.5 weeks... I hope this helps!
Have a great day!