At Fillmore East During this time, the group began struggling with drug addictions. Everyone in the group, with the exception of the brothers, was also struggling to make a living (vocalist Gregg Allman received more money from royalty payments and Duane more from session work). In one incident, tour manager Twiggs Lyndon stabbed and killed a promoter for not paying the band; he later claimed temporary insanity. Their fortunes began to change over the course of 1971, where the band's average earnings doubled. The Allman Brothers Band had first played Fillmore East in December 1969, opening for Blood, Sweat & Tears for three
The Fillmore subsequently used at the Fillmore East and Fillmore West venues. In the mid-1960s, the Fillmore Auditorium became the focal point for psychedelic music and the counterculture in general, with such acts as The Grateful Dead, The Steve Miller Band, Jefferson Airplane, Quicksilver Messenger Service, Moby Grape, The Doors, Jimi Hendrix Experience, The Byrds, Big Brother and the Holding Company, Santana, Frank Zappa's The Mothers of Invention, and British acts The Who, Cream, and Pink Floyd all performing at the venue. Besides rock, Graham also featured non-rock acts such as Lenny Bruce, Miles Davis, Rahsaan Roland Kirk, Charles Lloyd, Aretha Franklin,