[citation needed] Posters advertising each event were produced by psychedelic artists, including Rick Griffin, Stanley Mouse, Alton Kelley and Victor Moscoso.

An L-shaped, second-floor balcony surrounded the first-floor along the south and western walls, and the dance area was in front of the elevated stage in the northeast corner where musicians performed.

[11][12] The Family Dog on the Great Highway, at 2125 Pine Street[13] was a hippie commune, which hosted dances and events,[14][13][15] eight blocks[16] from the Avalon, frequented by Helms and his friends.

The Avalon was not as large as the Winterland Arena or The Fillmore, which had been used by Helms before Bill Graham allegedly violated their partnership agreements.

In 2002, after learning from psychedelic poster artist Stanley Mouse that the building was available, neo-hippie Steve Shirley (aka Morning Spring Rain) of the Hog Farm commune restored and re-opened the Avalon Ballroom 34 years after it had been closed.

[19] Acts including George Clinton and P-Funk, Robert Hunter, Arlo Guthrie, and Spearhead performed at the reopened venue.

[25] According to Sam Andrew in the documentary Nine Hundred Nights, he wrote "Combination of The Two" for the San Francisco late '60s scene, and "The Two" were The Fillmore and The Avalon.