Agreed with Guus and boboco85. When I worked in Ballston, before they fixed the bike rack in my company’s parking garage, I parked there as well. For showers I just ended up using the gym in the mall. If the building your new job would be in doesn’t have a shower there aren’t any other options I’m aware of in that area. You could also birdbath it with wet-wipes, I did that for a year or so and while not as great as a shower it kept me from smelling up the office.