A Light Ride. Everyone mounts every last light they can lay their hands on, on the bike. Flashlights, lanterns, especially glow sticks, you name it, tape 'em on and light up the place. Glow sticks on all the spokes would be great.

They sell glow sticks at Walmart, but I'll bet they'd run out fast if 50 different people all went in trying to buy a dozen each.