Singing Sirloin? What does it mean?

→ The Singing Sirloin, the "Home of Ballads and Salads," is a restaurant in Downtown Springfield where the waiters sing to their customers and serve their steaks "rare, medium, or well-sung." The Simpson family went to the restaurant for Marge's 34th birthday, although she was initially reluctant to go to a restaurant where the waiters sing.

The Simpsons also visited the restaurant to celebrate Bart's getting an A on an astronomy quiz at school. The waiters sang a song called "Happy First A" (to the tune of "Happy Birthday") for Bart. However, when Homer's credit card was rejected, the Simpsons attempted to dine and dash and were trapped. To pay the debt, they ended up having to sing themselves.