A floor singer may be taking his/her musical life in his/her hands. Bad sound, unless the venue is acoustic, bad accompaniment by the band who doesn't know the singer, a skeptical audience who has not heard of said performer and has not been set-up to receive what they do, which indicates to me that a floor singer might literally wind up prone on the floor depending on the quality of his/her performance.

I think an audience has to be prepared for what they are going to receive.

Frank