2 = James and Lily's Room.
3 = Rinoa's Room.
4 = Bunny Hatch.
5 = Heero's Room.
6 = Duo's Room.
7 = Rowen's Room.
8 = Sage's Room.
9 = Draco's Room.
10 = Harry's Room.
11 = Cloud's Room.
12 = Sephiroth's Room.
13 = Snape's Room.
14 = Seifer's Room.
15 = Squall's Room.
16 = Zell's Room.
17 = Laguna's Room.
18 = Remus' Room.
19 = Sirius' Room.
20 = Spare Room. (Probably Ryo's when he arrives ..)