We live in a flat in a terraced house, I think it was converted to flats some time in the 80s or 90s. It’s a standard sort of place with a low wall that separates the front “garden” (all flagstones) from the pavement. People stop and sit on the wall to chat all the time. No idea why, and no idea who they are. Maybe it’s perfectly butt height? Or the perfect width? Or it’s well positioned under a big, fluffy tree? Who knows. It’s kind of nice.