In the warren of grungy rooms beneath the dance floor--the celebrities' sanctum sanctorum--the coke was consumed by the linear foot, and (according to the author) the odd European contessa could be found handcuffed to a water pipe, getting squired from the rear by one of the pretty shirtless busboys.
Hard drugs were being used below the dance floor.
The parties that would happen below the dance floor were always free of alcohol and drugs.