https://en.wikipedia.org/wiki/Cass_Elliot#1962%E2%80%931964:_Early_career said:
America's folk music scene was on the rise when Elliot met banjoist and singer Tim Rose and singer John Brown, and the three began performing as the Triumvirate. In 1963, James Hendricks replaced Brown, and the trio was renamed the Big 3. Elliot's first recording with the Big 3 was "Winken, Blinken, and Nod", released by FM Records in 1963. In 1964, the group appeared on an "open mic" night at The Bitter End in Greenwich Village, billed as Cass Elliot and the Big 3, followed onstage by folk singer Jim Fosso and bluegrass banjoist Eric Weissberg.