John's place is about a 10 minute walk from the Dupont Circle metro station, which you can take to get downtown. There are also some nice restaurants in this area. The place is spacious and in a nicer area of DC.
John provided a visitor parking pass to use to park on the street. We arrived at night and had trouble finding a spot to park. There were more spots available during the day when people are at work. After we found a spot, we left our car with the visitor pass and used the DC metro to get around for our trip.