Jan's place is quiet and comfortable, and has perhaps the coolest floor I've ever seen. She is very hospitable, and made some helpful recommendations based on my interests.
The best feature may be its location. It's in the heart of Georgetown, and it's on a side street that isn't packed with pedestrians. There is reasonably priced parking about a block away, and a Lyft or Uber to the middle of DC is only about $10.