I take loads of photos of fenestration (translation = doors and windows). In Prague a few years ago we learned about the once-upon-a-time pastime of defenestration which is a 'polite company' word for throwing people out of windows. Fun folks were the Czechs of by gone times.
So while out and about with our group in DC the subject of door photos was being kicked around and it became a bit of a game; others in our party selected the doors and windows and I took the photos. I rather like this scene in Georgetown; it has a nice casual look about it the appeals to me.