In my college days, cold pizza in the morning was one of the staples of my diet. Leftover pizza was unceremoneously stuffed into the frig, box and all. I would grab a slice on the way out to my first class and I was good to go.
Apparently this has been somewhat commercialized. Tino's in Oneonta, New York, about 175 miles northwest of Manhattan, claims it's the original home of a curiously popular cold cheese pizza slice, which was created in 1985 and remains a top seller, particularly with area college students who use it to soak up the booze after late nights partying.
I'm not surprised that Tino's has quite a loyal following.