24 Hour Fitness has some promotions right now for those interested. You can get $0 Initiation Fee and $29.99 Monthly Dues on All-Club Sport Memberships. Expires 1/31/10.
Offer not valid in Reno, Northern CA, Maryland, New Jersey, New York and other select locations or at Super/Ultra Sport Clubs. Membership dues are $29.99 per month. All-Club access depends on membership purchased; All-Club Sport memberships do not include access to Super/Ultra Sport clubs. Taxes may apply. Not valid for current members. Dues must be paid by pre-authorized payment (eft).
Alternatively, you can get a One-Club membership for $199 a year upfront. Costco members can also get a 2-year All-Club membership for $299.