Sports settings are places where people can watch or participate in sports. Two common examples of sports settings are ARENAS and STADIA. An arena is an enclosed area, often circular or oval-shaped, designed to host sporting events, concerts, or other performances. A stadium, on the other hand, is a large outdoor venue with tiers of seats for spectators. Both ARENAS and STADIA are typically used for professional sports, such as football, basketball, baseball, and hockey.