I've posted this thought a few times in different ways, but in my experience, community is found and then built.

Regularly sharing space with others is the way to start finding community. I think your surveying is an example of that. The next step is when the interactions begin taking place outside of the regular time/place, as evidenced by your epilogue.

What I haven't posted before is anything about how to successfully create those connections. Maybe we get lucky and someone will share our taste in music or movies or what have you, and the connection will be almost effortless. But to increase the rate of connection, I've found that learning to ask good questions is key.

We can learn a lot from popular interviewers like Terry Gross, Johnny Carson, or James Lipton. But to provide some direct tips: Lead with open-ended questions (i.e. not "yes or no"). Ask follow-up questions. Share a little bit while asking questions (e.g. "I'm not really into X music, more Y. Where would I start if I wanted to listen to X?")

Of course, sometimes friendships just aren't meant to be. It's tough, and can feel like a waste of time to have made the connection, but I've been surprised multiple times when a conversation that seemed like a slog of a one-off led to fruitful friendships later.

That's one thing I've found about trying to meet new people. Try and find something they want to talk about, and the floodgates will often open.