 The social complexion of the band changed as well; ruled by Butterfield in the beginning, it evolved into more of a democracy both in terms of financial reward and input into repertoire.One result was the inclusion of two all-instrumental extended jams at the instigation of Bloomfield following the group's successful appearance at The Fillmore in San Francisco during March alongside Jefferson Airplane.Both reflected his love of jazz, as the blue note-laden "Work Song" featuring harmonica by Butterfield had become a hard bop standard, and the title track "East-West" used elements of modal jazz as introduced by Miles Davis on his ground-breaking "Kind of Blue" album.