I know what you are thinking but I don't agree with the reasoning. If a person pays for a room they are allowed to have people on the reservation up to the occupancy, to access it and to any amenities that comes with it for everyone listed on the room. There is no rule that says you must actually stay in that room. People have booked a room at a particular resort for certain access or location while staying elsewhere. It doesn't really matter the reason because they pay for both rooms. Some might go stay at Universal for a night or two but still keep their room at Disney and they are not restricted from the Disney resort amenities for that day or two just because they are sleeping at a Universal resort. This is no different. Not everyone wants to squish into a single room either but they may want to hang out. If it fits into the occupancy rules then no issues.