24 Hour Fitness is the world’s largest privately owned and operated fitness center chain. 24 Hour Fitness has five levels of Clubs, each with more equipment and amenities than the previous: Fit-Lite, Active, Sport, Super-Sport, and Ultra-Sport. For convenient locations, a membership for any lifestyle and budget, a variety of group exercise classes, kids clubs and a guarantee to reach your fitness goals sooner, sign up and join at 24HourFitness.com now.