Some ideas:
Have a po-boy at Johnny’s Po-Boys on St. Louis
Have gumbo, jambalaya and crawfish etouffee anywhere
Try the barbecue shrimp at Mister B’s Bistro on Royal
Drink a hurricane at Pat O’Brien’s
Walk around the garden and cemetery district
For an old school, classic dinner visit Arnaud’s on Bienville
Have a few beers anywhere with live music