Is it normal in the US to, 99% of the time, be able to strike up a conversation with a totally random stranger?

Today I started up a conversation with a guy as we walked into the bar to watch the Texans get eviscerated. He was carrying a book and I asked what he was reading. It was a copy of To Kill a Mockingbird and he explained that he is a 9th grade English teacher. Saw him again inside and struck up the conversation again by asking if he had seen Fail Safe and explained what it is about and how hard hitting it was as a young adult to realize momentous and terrible things that can only be achieved by great nations are at once also only achievable by individuals. No other single event had a greater impact on my understanding of how one man can change the world than watching that B-58 hustler destroy New York and with it the pilot's own family. I compared it's importance with that of 12 Angry Men and from there the conversation grew. We talked about movies and actors etc for a bit then about where we were from, where we've been, where we're going and other things over the course of about 90mins. Then he said he goes to that place often and would maybe see me around again soon, we shook hands and he took off.

I am typically a loner but when I do go out into social situations I like to make the best of them. I would say that I have random conversations with strangers on average about 1 time for every 2-3 times I am in a place long enough to have a conversation.

Strangely, I find that I am best at this type of thing and also socializing with women when I am very tired. If I am well nourished and well slept I will either have too much energy to be able to focus on the task for that long, instead choosing to have many shorter conversations with half of the bar, or I get bored and pull out my phone and next thing you know I'm engrossed in the history of nuclear accidents and the detailed accounting of what went wrong; that was yesterday haha. ADHD has it's pros and it has it's cons I guess.

/r/AskMen Thread