If you haven't noticed, the building in FNAF3 is very similar to a pizzeria. Notice the pizza on the walls, and checkerboard walls, which is very common.
It may be that the horror attraction takes place in an old pizzeria that was left to rot. They might've chose this for the 'horror' feel. But, this maybe the building before FNAF2?
Please, if you have something to say about this theory, post it.Read more >