I can see a restaurant serving stew making a go of it in a mall, with a lot of walk-by traffic and a group of people having access to many menu options. But imagine a group of people getting in a car and driving to a diner to get stew? I like stew, but I don't like it THAT much! They need other items, like maybe ... loose meat sandwiches?
Oh, did they come up with a name for the restaurant? I think "The Stew Pot" (from the episode title) would be good.