Few suggestions, in no order - succotash, rice and beans, ribs, grits, pumpkin pie, apple pie, jambalaya, file gumbo, tortillas, Italian subs, chili con queso, key lime pie, waldorf salad, coleslaw, corn bread, chowder, cornbread, shrimp kabobs, meatloaf, onion rings, muffins, any pizza....suppose it depends on what part of the US your chums think is 'typical' - quick trip to the Taco Bell and Krispy Kreme might be in order........
Mix of tex-mex and other stuff might do. Don't forget the beers and sodas, loads of chips and dips....