Sixties folk icon Bridget St. John keeps her idealism intact when she takes the stage at the Stone, a longtime bastion of the avant-garde where all show proceeds go directly to the musicians. St. John's deep voice is notable for its rich vibrato, and it has an honest, unpretentious quality that is as comforting as your grandmother's soothing delivery at story time. Even if you've never heard them before, her songs come off as familiar and wise, and there's something lovely about them that surrounds you like a warm blanket.