Oct. 16Displaced by Katrina, "we hung on to the band for dear life," says bassist Rene Coman. New Orleans' kings of swamp-Mex rock come to town with a CD charged by the experience, "If You Should Ever Fall on Hard Times." With Downbeat Five. 9 p.m. $16. Johnny D's, 17 Holland St., Davis Square, Somerville. 617-776-2004. www.johnnyds.com
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