Photo by myself on 42nd Street and Sixth Avenue.
A woman commuted to work last week, via scooter.
I can't say that scooting or biking to work is popular, but some New Yorkers do it. There is some risk involved, since drivers tend to be pushy.
Scooters are little more flexible than bikes, since they're a little more portable. You can fold them up and take them on the subway without a fuss.
Related posts: Eating on the Run, Ready to Rumble, in Alphabet City and Pedalling in Style, on Central Park South.