Doyle Jeter's "Enoch's Pub" in Monroe Louisiana (eclectic and regional music offerings all year long - there oughta be a website of some sort.)

Don't know if the scene is still intact but --- Just about every place on every corner in the French Quarter (NOLA) just about every night of the week.

Old-style R&B bands (great musicians leading off for a dynamic front man) @ BB King's on Beall St. in Memphis.   

There'll likely be lists of Festivals, etc. published well in advance on the main sites of news orgs internet sites in each City. If she gets a chance to hear long tall Marcia Ball (usually near TX or LA) --- don't miss her fer nuthin'.