Grand Isle looks like a fishing shack built by a guy with a big budget and a team of designers. The airy room, the walls of blond-wood beams, and the black-and-white photos of fishermen and oyster shuckers give the Warehouse District restaurant a style that could be called rustic chic. Located next to Harrah’s Hotel, Grand Isle draws its fair share of tourists. Plenty of young locals, though, make the trip downtown for the duck po’ boys, made-from-scratch gumbo, and Gulf shrimp with popcorn rice. The after-work crowd often jams the bar for happy-hour specials of raw oysters and boiled shrimp.