Last night Grateful Dead drummer Bill Kreutzmann and his Deal co-authordiscussed the new memoir at Sweetwater Music Hall in Mill Valley, California. Eisen surprised Billy by having the stage set for an impromptu jam session featuring Kreutzmann along with his Grateful Dead bandmate, his Billy & The Kids bandmateand his Rhythm Devils bandmate

[Photo by Josh Miller]

The quartet began the surprise, unrehearsed performance with an improvisation that eventually hit upon “The Other One” territory. Weir sang the session’s only full song, “Cassidy,” which featured an expansive jam that covered much terrain over more than ten minutes. Watch video of “Cassidy” thanks to nowiknowuryder:

Billy & Benjy’s Deal: My Three Decades of Drumming, Dreams and Drugs with The Grateful Dead book tour concludes on Sunday at The Chapel in San Francisco.