Sports centers are facilities that provide a variety of activities related to sports and physical fitness. The two most common types of sports centers are ARENAS and YMCAs. An arena is a large indoor space used for sporting events, concerts, and other entertainment. YMCAs are community centers that offer a variety of recreational activities, including sports, swimming, and fitness classes. Both ARENAS and YMCAs provide a safe and fun environment for people of all ages to enjoy physical activity.