There are two easy ways to chose your room.
 
1) If you would like to see the specific room types in each of the complexes and then chose room in that complex, click on "Complex"on the menu, select the complex and check the rooms offered.
 
2) You can also look for rooms based on size (studio, efficiency, one bedroom) regardless in which complex they are located. For that, choose "Room" on the main menu, select the room type you would like to see and then, chose specific room from the list.
 
Alternatively, you can use "Complex" and "Rooms" sliding blocks on the right.