The band's original core members, Ed Sanders, Tuli Kupferberg, and Ken Weaver, were joined at various times in the 1960s by a number of others, some of whom were noted session musicians or members of other bands. These included Weber and Stampfel, bassist John Anderson, guitarist Vinny Leary, guitarist Peter Kearney, keyboardist Lee Crabtree, guitarist Jon Kalb, guitarist Stefan Grossman, singer and guitarist Jake Jacobs, guitarist Eric Gale, bassist Chuck Rainey, keyboardist Robert Banks, bassist Charles Larkey, guitarist Ken Pine, guitarist Danny Kortchmar, clarinetist Perry Robinson, bassist Bill Wolf, and drummer Bob Mason.
