The doorways of all rooms are large enough for a
scooter to drive into the room.
The handicapped accessible rooms are no larger than 'regular' rooms in most cases. The ones with roll in showers are arranged differently - the bathroom is larger to allow room for a wheelchair or
ECV to get into the bathroom. That space often comes by making the bedroom part of the room slightly smaller.
If he finds it tight, he can contact Housekeeping and they can move or remove furniture for him.