This photograph instantly reminded me of solitary nights in Hong Kong when I would walk in front of my block and just watch the inhabited squares of a nearby building.  It amused me to see a square light up, a figure enter the space and live their normal lives right in front of my eyes.  It was especially fascinating to see kids run around, sometimes straight to the glass window to look at the world outside, completely unaware of a girl looking straight back at them.

(Photo from jingc)