Concert Poster
September 14, 1965
Poster
Verification Notes
antagonist: PASS — bill/date corroborated against chickenonaunicycle per-venue list (refreshed 2026-09-07) plus a second independent source; single-source or wiki-only claims hedged in prose, not asserted. Tuesday club night weeks after the Matrix opened (1965-08-13, Jefferson Airplane as house band). Roberts wrote "Hey Joe".
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