My mom shopped at the same grocery store for 30 years. Some of the cashiers lived in our neighborhood, and we would see them every time we went grocery shopping and sometimes around the neighborhood. The cashiers knew me by name from when I was a baby grocery shopping with my mom. I suppose it depends on what you call a meaningful discussion, but seeing the cashiers was like catching up with a friend. This was in Ottawa so not a small town, and I'm in my late thirties now.