This poster was printed twice before the concert. Some copies were printed at the Double H Press. But this was the last time that promoter The Family Dog used Double H and something must have happened during the printing process because a bunch of originals appear to have been printed elsewhere and the Double H Press logo was removed.
The woman in the poster is actress Alla Nazimova pictured here from the 1923 silent film "Salome". She kneels with the concert billing appearing from her cupped hands. This is a classic Mouse & Kelley composition, with Kelley selecting the image and doing the layout and Mouse doing the lettering. Note that at the bottom of the piece in white lettering is the message alerting the reader that the Family Dog will be at the "Gathering of the Tribes" at the Polo Fields in Golden Gate Park on Sunday.
The Human Be-In took place January 14, 1967 and is widely regarded as THE seminal event in the hippie/counter-culture movement. It was called a Gathering of The Tribes, and featured "All the SF Bands" (Dead, Airplane, Janis, Big Brother), LSD advocates like Timothy Leary and Richard Alperts, radicals like Jerry Rubin and Dick Gregory, and Beat Generation poets like Alan Ginsberg and Gary Snyder. More than 30,000 people showed up and the event received nationwide coverage.
Moby Grape had formed in September 1966 and were rapidly becoming one of San Francisco’s favorite bands. Their first album came out 6 months after this show and was so highly anticipated that the record execs released 5 singles at once which confused DJs and helped jinx the band. But not on these nights at the Avalon. The Sparrow were a popular Canadian band that later in the year changed their name to Steppenwolf.