The festival could take credit for birthing the informal gathering of people to make music: American drum circle. The drum circle evolved into “jam session.” At the festivals you would often find people, gathered in circles, making music out of anything. Musical instruments were made of anything one’s hand found.

Everybody jammed to the music they created with family, friends, and strangers. You could be walking past, see a group of people “jamming” and then join them. It was a musical community.
