It's obvious in hindsight but to me its really interesting you can collect data points on the community just by chatting with them. Maybe you could guess, by appearance or behaviour or something, whether most people at the gym are university students, or gym bros, or something else.

But by chatting with them, the world seems a bit bigger. And even if you don't see them again often, or don't chat again, its just nice that you have some level of familiarity and learn new things you wouldn't know unless you chatted with them. And although sometimes you have that awkward uncomfortable short conversation, every once in a while, you make a new friend. That is life, I suppose.