Lock it to the utility pipes. I lock my bikes to the water pipes in my apt's parking garage. If they let you,take the front wheel inside,otherwise a full size U lock should be long enough to pass through both wheels. Put the front wheel next to the rear and slide the lock through them so it's in the rear triangle of the frame. Like this:
BTW,here's some good info:
http://www.missinglink.org/Pages/bike_locking.html
http://www.sfbike.org/?theft_locking
http://www.bicyclesource.com/bike/th...securely.shtml