Today is bike-to-work day, and you can see what they're doing at the SF Bicycle Coalition website here
. It's actually Bike Month, and many large cities have bike organizations that are having a bike-to-work day, or bike week.
I've biked to work before. I like bicycling - although it's a little harrowing in traffic. If you drive amidst a flock of cyclists it can be difficult, especially if you're trying to be careful. If you're a pedestrian, well, some cyclists can be reckless, and you have to be careful.
But one of the things I think about is how unusual it is for people to be able to bike to work at all. Nationwide, the average distance for a commute is 16 miles, and the average time is slightly under 30 minutes. So, that's roughly 30 miles an hour by car. So, would you want to bike 32 miles/day to and from work? It's actually not that difficult, and it will keep you in shape - but through the rain? Over hills? Or even IN heels? Then there's sweat. What do you do about sweat when you get to work?
You also have to consider the type of job you have. Maybe your livelihood depends on driving around - like if you're a real estate agent. So, I can't help but feel that being able to bike to work is a choice, but also a bit lucky, if you have the kind of job/commute that will afford biking to work.