The Flying Saucer restaurant in Niagara Falls has been around for 40 years serving great diner food. You can't tell very well from the photos, but the original design was shaped like a flying saucer, and the interior decor and menus are all themed.
It's super cheesey but I think it would have worked in the 90s. I have no idea how hard it would be to get legal permissions for something like that.