The Barns of Wolf Trap hosts The Grandsons Friday as the band celebrates 20 years together with the release of a CD recorded live at The Barns one year ago. Winners of multiple area awards, the Washington-based ensemble defies typecasting with a repertoire that encompasses R&B, blues, rockabilly, country, pop and some Latin spice.

After graduating from Duke University two decades ago, Alan MacEwen put his music and English studies to use by joining forces with saxophonist/accordionist Chris Watling, a drummer and a bass player. Today MacEwen and Watling share the stage with drummer Matt Sedgley and a rotating battery of top area bassists. Along with playing guitar and trumpet, MacEwen sings and composes hip, witty lyrics and toe-tapping melodies.