Discount Grocery Mart
The Discount Grocery Mart is Mr. Krabs's favorite supermarket. It only appeared in the episode "Penny Foolish." Mr. Krabs brought coupons to the supermarket, but they expired 30 years ago. The Discount Grocery Mart is a bit similar to Barg'n Mart, the store where SpongeBob does his grocery shopping.
Exterior
The outside of the Discount Grocery Mart is like an average store. There is a huge sign displaying: DISCOUNT GROCERY MART in red text. There are balloons on the sides of the sign. There are also 2 windows slightly above ground, a small door to enter. and the windows and doors are separated by  small brown slats.