You do not need to be a part of a CAT Community or the same field of study to be pulled in as a confirmed roommate for a student participating in a CAT Community. When you select your room, the system will pull you and your other roommate into the room. Please note, if you were to drop the CAT Community at any time, that would mean that all roommates would be removed from the room and re-select based on the availability at the time of removal.