Q: Where did the spaghetti and the sauce go to dance?
A: The meatball!

Explanation:  I love spaghetti!  Grandma used to make the best spaghetti and meatballs.  A meat ball is a ball of meat, often found on top of spaghetti.  A “ball” can also be a dance (see the Cinderella joke).  This joke plays with the word ball/meatball and is kind of, sort of funny.  Thanks Daniel!