My gut says that it depends on what the Information Commons is, and on whether the Lower Level of the University Center is indoors or out.
If the Information Commons is a booth, kiosk, table, stand, desk, etc. enclosed within a building, or a part of the building like a small 'store' or office, I'd go with in.
I'd go with on if it is a freestanding booth, room, etc., accessible only from outdoors, even if it's an indoor experience once you're there.
Maryn, making it clear as the proverbial mud