I don't know how old this question is, but I can pipe in anyway.
Only do 24 hour Fitness if you are travelling in the western region of the U.S.. They do not have clubs on the east coast. Also, if you're committed to health and you are going to do 24 Hour Fitness, I recommend purchasing 3 years at once. Why? It's the best deal!!! It costs a little less than $700 (that comes out to less than $20 per month) and then only costs $50/year thereafter.