Keystone Jam is the name used on a Pure Jerry release to a jam played at the Garcia/Saunders Band show at the Keystone in Berkeley on September 1, 1974.
Recordings
Pure Jerry: Keystone Berkeley, September 1, 1974, Jerry Garcia & Merl Saunders Band, 2004 Pure Jerry Sampler: Vols. 1 to 6, Jerry Garcia, 2005