This week on “The Juke Joint” broadcast Robert Barclay shared gospel music and songs of the civil rights movement for Dr. Martin Luther King’s birthday. He included music by the Staple Singers, Clara Ward, Sam Cooke & the Soul Stirrers, Pete Seeger, Dorothy Love Coates, the Dixie Hummingbirds, Sister Rosetta Tharpe, the Swan Silvertones and Mahalia Jackson.