private SystemData SelectARoom(int availableRoom)
    {
        RoomName room = availableRooms[availableRoom];

        availableRooms.Remove(room);
        SystemData sysData = SystemData.GetDefaultSystemData();

        sysData.room    = room;
        unconfirmedRoom = -1;
        isRoomGroupShown.Add(true);
        currentRoomCount++;
        curSelectedRoom = 0;
        return(sysData);
    }