Disco music is played at disco clubs. In the late 1970s, there were famous disco clubs such as Studio 54 in New York City. Disco clubs have a large dance floor and a large pa system. A Disk Jockey (or "DJ") plays records of disco music through powerful amplifiers with a number of high wattage speakers. Disco music was usually played very loud, with lots of low bass frequencies. Disco clubs usually had coloured lights that flashed with the music called scanners, and mirror balls with hundreds of small mirrors, that reflect light onto the dancers and all corners of the room.