This may be old news (or not), but just the other day I noticed that there are now enclosed bike lockers that commuters can rent from WMATA. I think it is a pretty cool idea for those who are serious bikers and want more protection for their bicycle than the standard U-lock. The Brookland/CUA Station has 16 lockers.I looked into it and here are the details about locker rental from the WMATA website:
Bicycle lockers safeguard your bicycle by providing protection from theft, vandalism, and inclement weather. The lockers are designed to hold one bicycle each as well as bicycle gear. Metro currently owns and operates about 2,400 bicycle lockers.
Each locker has a unique lock and key. The space inside is approximately: 4′ high x 6′ 5″ deep x 3′ wide at the door and narrows toward the back of the locker. Most standard bicycles will fit inside. Longer bicycles such as tandem bikes or some recumbent bikes will not fit into the lockers.
To rent a locker at one of our stations, send us an email providing your name, address, contact phone number, email address, and station of interest. All locker rentals cost $120 per year, and are subject to availability.