"Cheese Pies"? Dang boy, You must be from the west coast or somewhere far away from NY, lol! I'm a recent transplant to the Pacific Northwest and I find it difficult to conform to the "I'll have a cheese slice" thing. In Jersey you say "Gimme a slice" and they plop down a regular or plain slice, here in the Portland area things are different. I ordered a plain slice the other day at "Pizza Schmizza" (nice name, duh) and the confused help there asked me if i was ordering a pepperoni slice. I had to cringe and say "No, I'd like a cheese slice."
I never knew how special the east coast was until I moved away. (the food, driving skills, work ethic, ethnic diversity, quality Italian goods and extra bitchy women).