Think of high-profile pizza chains and the usual suspects probably come to mind. But what about Costco?
This membership warehouse club is the largest such chain of its kind in the U.S., with 416 domestic locations as of 2010. Most of these locations have a food court, and most of those food courts sell pizza. Even accounting for a handful of Costcos that might not serve pizza, this would make the warehouse club the 15th largest pizza chain in the U.S., just below Round Table Pizza and above Papa Gino's.
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