Portland, JKLOL

 JKLOL (the harmony singing trio of Jefferson Hamer, Kristin Andreassen, and Lauren Balthrop) mean business about not taking this whole business too seriously. They’ve already earned gold-status in the folk star frequent flyer program, with Kristin fronting legendary old-time group Uncle Earl and having her own songs all over cable television, Lauren releasing an acclaimed album of original songs with Bob Weir’s own producer Josh Kaufman, and Jefferson winning a BBC award for his duo with Anais Mitchell. This new collaboration, nobody’s first rodeo, is built on mutual respect and a desire to bring something fun to the stage. At One Longfellow Square, 181 State St. $12 advance, $15 door. FMI: 761-1757 or onelongfellowsquare.com