Disco balls, often associated with the 1970s, actually trace back to the 1920s. Originally known as 'mirror balls,' they were used in nightclubs and dance halls to create dazzling light effects.

Under their picture were dozens of balloons (Sparkle and Swag) in colors of indigo and deep grape, along with a few disco balls. Those two uplighted colors bathed the premises, where more balloons, ...

Although disco music and dancing may be long dead, the disco ball lives on as a staple of dance parties everywhere. [Tim van de Vathorst] spent a considerable amount of time reinventing the disco ...