Christchurch: Solution

The solution was to go to 10-250, the large lecture hall with the purple seats and names of sponsors on the backs of the seats. If you look for each of the names mentioned above, and draw the appropriate connections between the rat and the rattee, you'll get the following pattern in the seats:

|   | ^-> ^->
|   | |   |
v---> |   |

The answer to the puzzle is ORR.