There's a Facebook event set up for a "Bike Ride Vigil" tonight from 7 to 8:30 pm.
From the event's page:
Gather on the west side of Old Main on the U of A campus at 6:50 and leave at 7:00 for a ride around campus with a stop at UMC to light candles. Return to Old Main at 8:30 for those who want to attend the Tuesday Night Bike ride.