Señor Ding-Dong's Doorbell Fiesta is a shop that sells a wide variety of musical doorbells. It is owned by Señor Ding Dong who was originally just a marketing gimmick.
While Homer and Bart were off driving a truck to Atlanta, after the truck's original driver, Red Barclay, had died from beef poisoning, Marge decided to have a little adventure. She, Lisa and Maggie visited a doorbell shop. They stepped inside, amazed of the myriad of bells. Gil Gunderson greeted them and Marge tried to explain him what kind of doorbell they want. Lisa quickly found the right one and Marge told her that Lisa should be a doorbell salesman, to Gil's chagrin who worries about "another piranha in the tank".