Pre-requisits for a nice, leisurely bike ride on Saturday evening:

Bike? Yup.
Helmet? Sure.
Water bottle? Can't hurt.
Clothes? Optional.

That's right, it's almost time for the sixth annual World Naked Bike Ride (and skate) Chicago, begins this Saturday at an undisclosed location (only those on the email list will get the details a few days before, to prevent voyeurs, and a few viewing points will be announced on the Web site). Riders will come in various stages of undress, bodies painted and ready to "celebrate the end of oil and the beauty of people" from 9 p.m.-midnight.

If you are thinking of racing (and the organizers aren't exactly encouraging), make sure to read the FAQ beforehand. And don't you dare bring a camera.