The band expanded from its folk roots, drawing inspiration from the Beatles, the Byrds and the Lovin' Spoonful, and gradually developed a more pop-oriented electric sound. Later that month, John L. Wasserman of the San Francisco Chronicle praised the band's "musical approach and style"—noting their blend of folk, blues, and rock and roll—and remarked, "Although there are but hints at this time, it is entirely possible that this will be the new direction of contemporary pop music." A few weeks after the group started performing, Peloquin departed because of conflicts with his bandmates, in part because of his disdain for their drug use. Although he was not a drummer, singer-guitarist Skip Spence (who later co-founded Moby Grape) was then invited to replace Peloquin. Spence quickly adapted and made his debut at the Matrix in September. In October 1965, after the other members decided that Bob Harvey's bass playing was not up to par, he was replaced by guitarist-bassist Jack Casady, an old friend of Kaukonen from Washington, D.C. Casady played his first gig with the Airplane on October 30 in the Harmon Gym at the University of California, Berkeley. The group's performance skills improved rapidly and they soon gained a strong following in and around San Francisco, aided by reviews from music journalist Ralph J. Gleason, the jazz critic of the San Francisco Chronicle. After seeing them at the Matrix, Gleason wrote in the September 13 edition of his "On the Town" column that the band, still without a record deal, would "obviously record for someone" eventually. Gleason's support raised the band's profile considerably, and within three months Katz was fielding offers from recording companies, although they had yet to perform outside the San Francisco Bay Area. Two significant early concerts featuring the Airplane were held in late 1965. The first was the historic dance at the Longshoremen's Hall in San Francisco on October 16, 1965, the first of many "happenings" in the Bay Area, where Gleason first saw them perform. At this concert they were supported by a local folk-rock group, the Great Society, that featured Grace Slick as lead singer, and it was here that Kantner met Slick for the first time. A few weeks later, on November 6, they appeared at a benefit concert for the San Francisco Mime Troupe, the first of many promotions by rising Bay Area entrepreneur Bill Graham, who later became the band's