Moby grape avalon ballroom san francisco concert postcard 1967 us promotional only 5 x 7 12 postcard for the august 10 13 1967 concerts at the avalon ballroom san francisco which featured moby grape canned heat vanilla fudge northamerican ibis alchemical co the family dog was a loose collective of free spirits managed by chet helms a contemporary of bill graham who put on rock dances at the avalon ballroom more or less continually from 1965 to 1970 these almost nightly event