Customers wait in line at a Sbarro location - Alex Wong/Getty Images If you want to catch a slice of pizza at a shopping mall, the first place you probably think of is the food court staple Sbarro.

Through the 1980s and 1990s, a trip to the mall meant stopping at the food court to fuel up with some quick and inexpensive snack or meal. Sure, everything in that little alcove offered the same foods ...