Residence Inn Arlington Courthouse
On 3/24/10, the Residence Inn Arlington Courthouse was serving decent burgers. The lettuce, tomatoes and other toppings were fresh. The cookies were good as well. I think that they also had hot dogs.
The burger wasn't the greatest I ever had, but it was good enough that I chose to eat at the hotel (for free) instead of heading down the street to Ray's Hell Burgers.
The only negative is that this particular RI is not able to serve adult beverages, thanks to Virginia's blue laws.