when I was a teenager I worked in a drugstore part time. (small family owned store). The owner/druggist had mentioned that some of the older folks in the area came in to buy a paper, just to have someone to talk to. So whenever I had a customer I always smiled and said Hi, how are you - realizing it might be the only human contact they had that day. I guess nowadays I would be an UNtypical teenager.
It was a nice store - they had a chair where you could sit and wait while your scrip was filled - one old guy from the neighborhood used to come in, sit down and have a nap. No one ever kicked him out.