when I was much younger I worked PT in a non-chain drugstore in an older urban neighborhood. I always made it a point to smile and speak kindly to the older customers, after my boss pointed out one who he said came in every day to buy the paper because that was his only contact with the outside world. I figured I might be the only person they interact with that day, so I wanted to make it a good interaction.
That was a nice oldfashioned drugstore, there was a chair where you could sit and wait for your meds to be filled. One old guy used to come in, sit down and sleep for awhile, no one ever bothered him.