I had a great time while staying with Dennis. I didn't see him but once, but he was helpful with knowledge about the air and space museum. His place is just 25 min. walk from the Capital and National Mall. There are bikes (capital bike share) near Waterfront Metro. You can walk to Jefferson Memorial via Anastasia river walk starting with a beautiful park (with Titanic memorial) about 500 meters from his place.

Bus number 74 stops about 100 meters from his front door.

I was thankful for the air conditioning in his house. Washington can be brutally hot in summer. The room also has a ceiling fan.

Everything else was just as pictured.
Thanks much for a great time.