Been a member for over 6 years. Love the 24 hour operation.And I believe they have the most locations across the country. And I think they're less evil out of all the other commercial gyms, in terms of contracts and cancellations.
In case you didn't catch the previous threads, 24 Hour Fitness sells prepaid memberships at Costco. No commitment, no sign-up fees. It's $300 for 2 years. When the term ends, you can walk away or buy another card at Costco.
Oops.. scratch that. They ditched the 2-year deal and now offer 3 years for $450. link