The list of alumni from Denver’s East High School that went on to successful show business careers reads like that of a prestigious New York or Hollywood institution: Pam Grier, Don Cheadle, T.J. Miller, Harold Lloyd and Sidney Sheldon all graced its hallways growing up. And there’s something special about the musical genius that has moved through the institution over the generations: Paul Whiteman, legendarily billed as the “King Of Jazz” in the early 20th century, graduated from East High.