Nightclubs that serve food have cooks, dishwashers, and servers to prepare, cook, and serve the food. Nightclubs also have coat check employees who hang up the patron's coats, sound technicians to maintain the sound system (the CD players, amplifiers, and speakers), and cleaners (to sweep the floors and clean the bathrooms). Some large nightclubs may hire DJs to work in the club every week as employees. 