One thing I don't miss about living in New Orleans is the mess the city becomes around mardi gras, such a pain especially when I lived uptown. I would imagine Le Petite Grocery wouldn't be out of the question.
Not sure how casual you're looking, but there's also Theo's (pizza), Nirvana (Indian), and Storyville (really excellent burgers, etc.) very nearby. And Pascal Manale's is definitely a doable walk down Napoleon, and (just) off the evening parade route.