|Allyn Ann McLerie||Shirl|
|Marilyn Hassett||Dancer 75 (uncredited)|
In the midst of the Great Depression, manipulative emcee Rocky enlists contestants for a dance marathon offering a $1,500 cash prize. Among them are a failed actress, a middle-aged sailor, a delusional blonde and a pregnant girl . Days turn into weeks as the competition drags on and people either drop out or expire. Rocky, however, will do anything for publicity and initiates a series of grueling derbies.