Get a Brompton, you can fold it up and bring it inside, perhaps even get a bag to stow it in, in the office.
even under the desk.
with a set of High pressure tires they are as Quick as you legs make them.

M bar with Ergon grips, Brooks B-17 if you wish..

then fold it up and take the Bus , if it's right there.

They are Fun Bikes to Ride..

http://www.bikesatvienna.com/

& bicycle space 459 I Street, NW Washington, in DC