At least once a week, Kasey Rausch strums her rustic folk tones somewhere in the two-state area. She has regular haunts (Prospero's, Davey's and Rural Grit at the Brick), but she saves space for oddball outlying venues (the Pizza Shoppe in Savannah, Missouri). Like her upcoming Cup and Saucer set, most of Rausch's concerts charge no cover. Her debut disc, Born Near the Waters, recorded last summer in New Orleans, gives grateful fans a way to repay Rausch for her gratis gigs. Dallas Jones, an Ozark-spawned bluegrass daredevil, adds even more value to this weekend's finest free show.