“Amid the clutter of instruments in Barr’s Fiddle Shop on Galax’s Main Street, three guys sat playing bluegrass tunes on guitar. Sometimes, the owner Stevie Barr – a man who had played for the Queen when she visited Virginia in 2010 – would join in. They took turns at lead while connecting only briefly by eye contact. At the end of the song, I asked how long they’d been together as a band?”