sentences:  Gamble Rogers began performing around Florida in the 1960s, often performing with other noted Florida singer-songwriters Paul Champion, Jim Bellew, and Will McLean.By the 1970s, he was a regular fixture at the Florida Folk Festival, often as the headliner.He appeared in James Szalapski's 1976 country music documentary film "Heartworn Highways", performing an onstage comic monologue followed by "Black Label Blues."