Self-described purveyors of "acoustic mayhem," the Waybacks -- violinist and mandolinist Chojo Jacques, guitarists James Nash and Stevie Coyle, bassist Joe Kyle, and drummer Chuck Hamilton -- range from Charlie Parker jazz tunes, chicken-pickin' country, Irish reels, and Parisian swing to agnostic gospel, cowboy tunes, eccentric originals, beat poetry, and cliché-free folk. Veterans of some of the leading Bay Area bands, including Large & in the Way, the Frontmen, the Hot Club of San Francisco, and Trailer Park Rangers, the group's air-tight arrangements swing with fervor and intensity, spotlighting spine tingling vocal harmonies and some of the hottest instrumental playing you are likely to hear on either side of the Rockies. Tonight, the group recently celebrates the release of its second album, Burger After Church.