This photo, from 2004, is another one I enjoyed encountering again. See also these photos.
I appreciate that, for you, it is nothing special. To you it is just some people doing some fairly insignificant and undisruptive work, in a courtyard:
But, this is my courtyard, and the contrast between how my courtyard usually looks and how my courtyard looks in the above photo is, to me, pretty dramatic.
Also, the improvements that these good people were contriving were of direct benefit to me, making the process of putting out my rubbish significantly less depressing and actually even rather enjoyable, because my courtyard ceased from being depressing and became a nice place to visit. This was, and is, no small thing.