Grateful Dead, Allman Brothers, Hampton Grease Band, Spirit, Delaney & Bonnie & Friends, and Chicago Transit Authority
Notes
Explanation of this jam from Patrick Edmondsons report: "Big horn section, background singers, eight drummers, a bass quintet, and Harold Kelling, Glenn Phillips, Duane Allman and Dickie Betts, Delaney Bramlett, Chicago’s guitarist, Randy California, and Jerry Garcia trading and interlacing lead lines. This was a two-hour shakedown song before they settled into 'Dark Star' experimentation."