This is probably one of the smoothest performances ever!
Enjoy BB King and others playing the blues for hardened inmates, in Sing Sing Prison back in 1972. The first thoughts about this were not that positive to gather all these prisoners together for a concert, without starting a riot... But the concert fortunately proved to be a celebratory experience to both BB/Joan as well as for the prisoners. Nothing but great feelings!
And since Joan baez is one of my favourite musicians here is a video from the same concert with her and her sister Mimi Farina:
"There was a riot at Sing Sing prison but it was a riot of music, emotion, enthusiasm and good feelings. What a day. What a concert!"