A structure, portion of a structure or area (either indoor or outdoor), including, but not limited to, movie theaters; concert halls; stadiums; amusement parks; carnivals; churches; elementary, middle, high, secondary and post graduate schools; day care centers; private commercial schools, such as martial arts or dance studios; clubs, lodges and arenas, designed primarily for people to gather to observe or participate in a single event or series of single events, including but not limited to the presentation of a motion picture, a concert, an educational presentation, a sermon, an inspirational presentation, a rally, a lecture, a drama, dance, musical or other live performance, or a sporting event.