New Orleans rockers Cowboy Mouth, still anchored after 40 years by wildman drummer Fred LeBlanc, will play The Windjammer on Aug. 17.

Expect to hear the band’s biggest hit, the knockabout rocker “Jenny Says,” as well as a grab bag of favorite songs from a new album called Cover Yo’ Azz! . It includes Cowboy Mouth’s passionate, garage-rock version of The Replacements’ gem “Can’t Hardly Wait” and a bluegrass version of Queen’s “Fat Bottomed Girls” that’s a lot more fitting (and funnier) than you’d think.

But Cowboy Mouth is only a piece of the puzzle the Windjammer weekend. The band is part of a two-day celebration called the Hazelnut Hang, a sort of mini-festival created by the Gainesville, Fla., band Sister Hazel.

Sister Hazel had its biggest mainstream hit back in 1997 with “All For

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