Opower, the Arlington Va.-based software as a service company that helps energy utility companies engage with their customers, may have one of the coolest offices in the DMV. The workspace has everything to make life easy and enjoyable for its 350 employees, from catered lunches once a week, to a fully stocked refrigerator and coffee station, a liberal bring-your-dog-to-work policy, and bike racks for the many employees who commute on two wheels. Take a look at their beautiful office.