Founded in 1983, 24 Hour Fitness USA Inc. is one of the largest fitness club chains in the United States. The Better Business Bureau accredited company has more than 400 United States clubs in 17 states. 24 Hour Fitness USA Inc. has over 3.5 million club members. In addition, the company has centers in numerous countries, such as Hong Kong, Malaysia and Singapore. It has partnership with a number of companies, including Coca-Cola, Dial and Everlast.