 In 1951, when he co-founded the Roslyn Music Group, presenting chamber-music ensembles and soloists on Long Island, his concert career as an impresario was underway.Because Long Island had "an omnivorous appetite for the arts", as he phrased it, Bernstein launched the nonprofit Concert Hall subscription series in 1964, offering approximately 30 annual performances of classical, jazz, dance and theater, including Broadway road company shows and New York Philharmonic concerts.The events were staged at Long Island University's C. W. Post Center, the Nassau Coliseum and other Long Island auditoriums.