The Sea Chicken Shack
Their menu is basically burgers, fries, and soda.
They have a "Head Bands = No Service" policy.
They have a commercial quoting that they are the "Best Restaurant in the Sea", which made people go there, but it turns out that the shack is really rust bucket dump. Their customer safety is also awful, because Billy sat on a chair and it collapsed. But it seemed he was unhurt as he drank a soda after falling down.
Their statue of Mr. Sea Chicken is pretty much the only reason that they are popular. It is like some sort of jungle gym. SpongeBob climbed the statue and seemed to enjoy it.