Local bluegrass outfit Packway Handle Band is well-known around Athens and far beyond for its expansive string workouts, but Sans Abri (which translates from français as "homeless" or, literally, "without shelter"), a duo composed of Packway's Josh Erwin and Michael Paynter, scales back the pickin' prowess in favor of a barer, folkier, guitar-and-mandolin sound. Tuesday's show is the culmination of a monthlong residency at Green Room and a celebration of Sans Abri's debut record, the appropriately titled Shelter. The album (really an EP, clocking in as it does at only 22 minutes), out on the Athens/West Virginia imprint Twin Cousins Records, is a spare but solid seven-track outing that showcases the duo's often playful songwriting prowess.