On Sunday, July 21 at 8 p.m. the blues duo Mulebone will perform outdoors at Studio Stage, located at Lake Street Studios in Glen Arbor, as part of the Glen Arbor Art Association’s Manitou Music Festival. The rain location is the Glen Arbor Town Hall. The festival is celebrating its 23rd season of jazz, classical, blues, folk, country, celtic, bluegrass and world music on the Leelanau Peninsula.