I haven't tried a lot of urban sketching...but for the city life prompt I pulled out a picture from London. My B & B was on Gower Street in Bloomsbury. While there, I read a book about Virginia Woolf's years in that very same neighborhood.
“Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.”
― Virginia Woolf, A Room of One's Own