Most hotel rooms have no provision for cooking in the rooms. I think that's what the OP is working with.
I was just stating cases where the room might more likely qualify as a dwelling unit. There may be more reason to not share branch circuits with other "rooms" if it is a dwelling than if a basic guest room. I don't see any prohibition to say placing back to back receptacles in common wall of two units on same circuit in a typical guest room arrangement, particularly if the panel is in common space and not in guest room.
I don't see any prohibition either, but that's a good way to burn a lot of time keeping track from room to room.
Wouldn't that common wall be the same every time as well? Seems your apprentices and even occasional journeyman would make less mistakes if there were one circuit for both sides of wall than they would with two circuits and have to keep track which side circuit each belongs to.
Might just be a double wall with fire rock between, so might not even be a feasible option
That creates potential problem. Still need to penetrate a firewall somewhere with either feeders or branch circuits though.