The Curves by my house is open from 9am to 6pm, and closed between 12-2 every day. I had really wanted to join, but just bought the book and do some exercises from that, it makes lots of sense! My only complaint is the price (43 bucks a month plus a 200 dollar sign up fee? eek!), and their hours. Fortunately, quite a few gyms (with better hours and price) offer a circuit a lot like it