Agree w/Aquilah about checking the prices in your town. Also ask them about what kind of discounts they have. Most gyms usually offer trials , so ask about that too.
For me , I go to Gold's Gym.
Gold's usually cost me $45 , but since I'm a student and I have a year - long membership. .. it cost $30 a month. My friend onli pays $20 cuz he owns a country club and the owner of Gold's goes to the club
Also check out the different registration fees, as they can be expensive. Mine was over $100 up front.
hth