I think the quality of the 24 hr Fitness depends on the neighborhood. I belonged to one for a while that had a problem with vandalism and someone was actually mugged in the locker room. I now belong to Cherry Creek Athletic Club. It is pricey, but if you swim, it is the place to go. They have 2 lap pools (indoor and out) and a leisure pool (outside). The outside pools are open from March thru November.