I'm in Biloxi, MS (Ocean Springs, to be exact) for a couple of days, and I'd like some good local-flavor recommendations. I'd really like to find a good po-boy shop or something like that. I'm not looking for five-star. I'm looking for the sort of place where the tables are gold-flecked linoleum, the special is written in magic marker on a card stuck to the wall behind the counter, and the cook has spent the last 20 years perfecting his momma's gumbo. Any recommendations?