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
Black Beauty: Miles Davis at Fillmore West the departure of saxophonist Wayne Shorter from the group earlier that year, Grossman was enlisted by Davis to participate in an April 7 recording session for his next album "Jack Johnson" (1971) before joining the live band. The April 10 show was the second of four concerts Davis played at the Fillmore West that month and one of his first concerts in a rock venue, having performed at New York City's Fillmore East a month earlier. His change to rock venues, suggested by Columbia Records president Clive Davis, helped the label market "Bitches Brew" to the counterculture audience. According to