Hi! You could identify the paired rooms based off:
-how both rooms are themed/decorated similarly (ex. both rooms have plants in them, or both rooms have art displayed)
-how the animals in both rooms are doing the same thing (ex. both animals are cooking, painting, etc.)
-how one room relates to what an animal in another room is doing (ex. one animal is reading, and one room is full of books)
Hope this helps!