Chum Bucket

The Chum Bucket is a restaurant founded and built by Sheldon J. Plankton, the main antagonist of Spongebob Squarepants.

As its name suggests, it is a fast-food producer with the exterior of a large bucket, and it only serves a single type of food; chum. As such, the restaurant literally never gets any customers, driving the evil genius Plankton to attempt to steal his Mr. Krab's secret recipe of the Krabby Patty, an extremely praised burger at Krab's restaurant.

The Chum Bucket has had customers before, but these moments are extremely rare and have a bizarre reason behind it. For example, Plankton once hatched a scheme where he brainwashed the town celebrities into eating at the bucket, triggering dozens of fans to follow. Another is that he changed the restaurant's layout so it's in a series of beautiful caverns (and later a Roman coliseum), making people go not for the food, but for the attractive environment. The only resident at the Chum Bucket other than the founder is his wife, who is an extremely smart and emotional artificial intelligence Plankton engineered named Karen.