A popular local pizza chain in Atlanta -- they've expanded to a few other cities, but they started here -- is called Mellow Mushroom. Rumor has it back in the late '60s and early '70s, they topped their pies with "special" mushrooms for special customers.
Whether that's true or not, they make kick-ass calzones. The stuff on them that looks like oregano is, in fact, oregano.
I also witnessed then-councilman Bill Campbell (now former atlanta mayor and convicted felon) purchase small and large qty of marijauna on several occasions at that store. He also ordered pizza with "special" toppings...heheh.
I'm pretty sure it was just the store manager, tho. He had a special cooler strictly for the pot and hired off-duty Fulton county deputies for security. I got to know the guy because we had a mutual interest in science fiction (and a certain female fan).