Decades before the advent of the "Disco" ball, dancehalls, nightclubs, and speakeasies prominently

Decades before the advent of the Disco ball, dancehalls, nightclubs, and speakeasies prominently featured one of these beauties above its dancefloor. A cast metal shell is covered in hundreds of variously sized glass mirrors. Dazzling cascades of reflected light are directed outwards when bathed with spotlights.