The word prolific is often thrown around when talking about singer-songwriters, but with Martin Sexton, it’s no exaggeration. He got his start in Boston, playing open mics and busking in subways and on street corners. He’s released numerous albums, received awards for his music and reaped praise from the likes of John Mayer and Dave Matthews. He brings his Abbey Road Show to Kent Stage. Doors open at 6:30 p.m.