I'm car-free, so I ride everyday. Ironically, I've not ridden to work on Ride to Work Day in years. I take a vacation day and hand out breakfast tacos to other bicycle commuters, then I give a presentation on bicycle commuting to whichever corporation signed up for it. I wrap up the day at a Bike to Work Happy Hour.
I'm supporting the cause, but it's just funny that I don't get to ride that day.