Curves for Women is great! It is only for women, so you don't have to worry about looking "cute" while you work out. They have machines that are made just for women, and work all the major muscle groups. You do strength training and aerobic training all in 30 minutes. The music played is upbeat, keeps you going all 30 minutes. The final stretch exercises keep you from getting sore, and keep your muscles toned. There is a monthly fee, but you get to go as often as you want, and can visit any other Curves locations for free!