At Fillmore East June 27, the Fillmore East closed, and the band were invited to play a final, invitation-only concert, along with Edgar Winter, the Beach Boys and Country Joe McDonald. The Beach Boys initially refused to perform unless they headlined the event, but Graham refused, telling them that the Allman Brothers would be closing the show, and they were free to leave if they disagreed. The Allman Brothers' performance was used for additional tracks when an expanded version of "At Fillmore East", "The Fillmore Concerts", was reissued on CD. "At Fillmore East" showcases the band's eclectic mixture of blues, rock, country, and
At Fillmore East Phil Walden explained to executives that the band were less of a studio band and that live performances were most important to them. In all, the album featured seven songs spread over four vinyl sides. The album received strong initial sales. While previous albums by the band had taken months to hit the charts (often near the bottom of the top 200), the record started to climb the charts after a matter of days. "At Fillmore East" peaked at number thirteen on "Billboard" Top Pop Albums chart, and was certified gold by the Recording Industry Association of America that October.