 After returning to San Francisco for two hometown shows at the Palace of Fine Arts Festival on August 31 and September 1, Joplin announced that she would be leaving Big Brother.On September 14, 1968, culminating a three-night engagement together at Fillmore West, fans thronged to a concert that Bill Graham publicized as the last official concert of Janis Joplin with Big Brother and the Holding Company.The opening acts on this night were Chicago (then still called Chicago Transit Authority) and Santana.