9. Hoboken, N.J.
Percentage of bicycle commuters:
Seriously, Hoboken? The same town in which landmark rock club Maxwell's just announced it was closing down because of the lack of parking?
Well, yes, and parking has a bunch to do with it. Biking down Washington Street isn't exactly the most bucolic or even relaxing experience, and the waterfront trails are already too packed with walkers and double-wide strollers to be considered legitimate thoroughfares. But even in a town a mile square where just about everyone works across the Hudson River in a city that isn't connected to Hoboken in any bikeable fashion, just getting to your chosen form of public transportation can warrant a good bike.
The PATH train station, the NJ Transit train and the ferries across the river can be a hefty hike if you're all the way across town, but Hoboken's relatively flat terrain and simple grid street layout are more quickly navigated by bike than by cab or foot. We'd recommend strong locks and not biking down to Pier A Park until a weekend or holiday, but it's doable.