G Dan Mitchell

Excellent U.K. folk-rocker Jake Bugg plays the Regency Ballroom. (Courtesy UMusic)

Sept. 12-13: Jake Bugg, Dave Barry, Funny Fest, Karen Paget, Rachel Ignotofsky, Heima, G Dan Mitchell

MONDAY, SEPT. 12 Jake Bugg: The U.K.-based singer-songwriter -- of whom NPR…