Jerry Garcia
- electric guitar (lead), vocals
Bob Weir
- electric guitar (rhythm), vocals
Phil Lesh
- electric bass, vocals
Ron McKernan
- organ, vocals
Bill Kreutzmann
- drums, perc
See SF Chronicle "Ad Libs" event listings section of Ralph Gleason's column in the day prior (7/3/1967, page 29). Bands are not listed but based on research by Dan Sullivan for a book of Jim Marshall photos, he dates one of Jerry (playing guitar) and Jorma giving the finger to the camera to this date. The GD were in town and Jorma probably was too.