We had great Cat 9 connecting rooms.
With 2 DD's, DH And DW, the extra space was great.
The kids got plenty of privacy and EVERYONE HAD THEIR OWN SINK!!!!!
you got double everything: Tv's, Bathrooms, living rooms, etc.
The kids even had a sleepover in their own room with their new friends.
We heard one group of friends ask our DD's "Jeez, how many people are in this room." It was just them.
Technically, though, one adult and one child is assigned to each room. Just tell the room attendant what you are doing and it is fine.
Ask at guest services for one extra key for each room and you are all set.
Best thing we ever did.
Jim
PS, We also gave the kids a stack of about $40 in $1 an $2 bills. We told them to use room service anytime they wanted, but to always tip appropriately. It was a great learning experience.