MAYBE-BAD-ADVICE ALERT
I stopped pretending to care lol.
If someone approaches me and starts talking about how their spinning class was lit, I reply (honestly!) "That's great!", and start talking about things that interest me—even suicide. People are aware of it and I feel better not pretending anymore, and it actually gives me more strength to feel the love from my people, and find different approaches.
Plus, some things are a way for others to express themselves- so maybe asking that customer mentioned above at my job: "Why do you like spinning classes so much?", will develop the conversation in a deep way. Or not.