The Blushin’ Roulettes deliver sultry, smoky, swingin' twang. "Their songs are stripped down, sexy little jewel boxes stuffed with ancient mountain magic," says the San Francisco Free Folk Festival. Guitaress and songwriter Angie Heimann belts her stirring songs of damsels in their bliss and distress in a clarion vibrato often likened to Iris Dement. Cas Sochacki thumps the double bass and interlaces bright dobro stylings amid the rich lyrics of the Roulettes' more serious songs, and rings in vocally with…