Don’t be fooled by the harmonica, the saxophone, or the ringing, Doorslike church organ: The Delta ’72 isn’t your father’s punk-rock band. On The R&B of Membership, the D.C. quartet joins a similar club to Girls Against Boys, brewing its own punk on the same label, Chicago noisemart Touch and Go; the group lets genres bleed together, then adds the pinpoint aggression of D.C. hardcore. So while the band borrows some bluesy riffs and rockabilly bounce, the end sound is sweaty, sleazy, seductive, and sly, owing more to the Stooges than Jim Morrison. It’s enough to make the more straight-ahead Bluetip—the first line of whose new self-titled Dischord CD is “Fuck shit up”—seem downright stodgy by comparison. Also with Hobart at 9:30 p.m. at the Black Cat, 1831 14th St. NW. $5. (202) 667-7960. (David Daley)