Check out the Blue Moon Saloon & Guest House, Lafayette, LA, for the best in southern music:

The Spotted Cat Music Club, Frenchmen Street, Faubourg Marigny, New Orleans:

Kerry Irish Pub,French Quarter, New Orleans

Harry's Corner, French Quarter, New Orleans

(Not to be confused with Fat Harry's, a fine Uptown landmark)

...and while in New Orleans, walk the three blocks of the Frenchmen Street music district.