You can take your car to park in front of Capitol Court. Take a walk from Capitol Court to the washington monument. As far as I remember, its 16 blocks. In the mid way, just on the right you will see an ice skating court. I am not sure if that is there at this time of year. Be sure to post back if you find that place still for ice skatig. Take a round at washington monument and walk right away towards White house. Don't go there during late evening, you will hardly see white house. Make a day trip. Also dont foget to visit Pentagon Mall.