A twin size willl probably fit at the foot of the beds or right in front of the window/door area - but you will have to move it when not in use - no way to walk around it. We have used a Coleman Brand Twin size in a Pop room with a king bed and they was enough space - we just propped it against the wall during the day.
ONe will fit - we used ours in front of the window. You might have to move the table and chairs a bit but it does fit. Put it against the wall in between the bed and the bathroom during the day. And don't worry about housekeeping, they are used to it.