Peasant, with Matt Bishop, Mike Giacolino. Tractor Tavern, 5213 Ballard Ave. N.W., 789-3599. 9 p.m. $6. Peasant’s songs come from a heart out of small-town Pennsylvania, written in a bedroom and recorded in the attic of a 200-year-old barn, in the case of the last album, Shady Retreat. Simple, earnest songs ring with just that warm intimacy and hewn history that lone member Damien DeRose’s locations honor. But rather than keeping things too heavy or too sappy, Peasant plays more like Elliott Smith if Smith were a lot more optimistic about things, with a similar shivery vocal and knack for easygoing melody.