Reservation calendar for event rooms
Click on the triangle symbol at the top right of the calendar - Then you can see the legend and select the different event rooms (not in every browser possible).
The last two letters of the reservation code will tell you which room is reserved:
Co = CAB F21
Cu = CAB D21
Ca = CAB outside area
Ho = HXE C1
Hu = HXE B1
Hs = HXE B2
Ha = HXE outside area