The first digit in the room number is building. The next two digits are the floor and the last digit is the room number. I believe the evens (2,4,6) are pool view and the odds (1,3,5) are outside views in building 1 and 2 and 7,8,9are OF with 8 being poolside, 9 middle, and 7 outside. All of building 3 is OF. I don't know how building 4 works.