There are many options for fitness clubs. In my pat experience, I'd rank their sales tactics up there with the used car industry.
24-Hour Fitness, however, is different. They don't have "contracts", simply monthly payment plans developed on what you wish to achieve. You can cancel at any time (usually takes a month for payment reasons), and they won't hunt you down to regain your membership.
They have an amazing array of traditional weight machines, a circuit training set, a Jr. Sized Olympic Pool (with classes!), Yoga, Pilate's, Kick-boxing classes, and all the other bells and whistles you'd expect from a state of the art fitness facility.
They do have a kid's care, around $4 for 2 hours, drink and healthy snack machines, and other offerings (personal trainer, food program, etc.)
Good stuff. If you want a change, and a place with a wonderful salt-water filtration system (no chlorine!), this is the place for you.