A month or so ago I was watching Adam koebel run FATE and thats where I seen zones used for the first time in a clear way. There was a scene in a hotel room.
The zones were-
Reception. (police arriving)
Hallway. (pc preparing a trap)
Hotel room. (dead body and rest of pcs)
Fire escape. (the way out)
And street. (Freedom, almost)
During the scene it developed further and he just added another called alleyway, which was over the road. I found this so clear to understand. He displayed it just in a simple flow chart.