Hey John, I'm curious as to the stopping by the liquor store too. Hopefully you are not drinking. As far as spontaneous conversations, I've come to learn that people are an interesting species. So many different colors, shapes, sizes and flavors. Some are natural social butterflies, others are more introverted and keep to themselves. Of course both types can be affected by addiction. I think the important think is that you made an observation and its something you can maybe learn from.
Side note, I'm in the midwest of the US, and today at my open house I met a couple from Beijing China. They were nice enough to stay talk with me for awhile. They told me about life in China and in the city of Beijing. I believe there is always something to be learned from others. Take care John, and I wouldn't take it personally about a lack of response. Sunday evening, might be pretty quiet around here.