I think its in the order of
! 32 cells to hallways. Considering that the outside of the hotel is considered a hallway. Every cell on the edge can have a door, so people can get in privately... ;) I think this solves dr. bees problem better than the problem statement from the architect, as dr. Bee did not want any hallways and is asking the number of hallways to be minimized. the architect is so in his human bubble, he did not consider not every room, needs to border to a hallway.
