Seconding hobbies. As long as those hobbies take you around people. Go to conferences or stores where you’re likely to meet people.
Oh, and nostr harder. I’ve connected with several who I now chat with almost daily, including IM.
Discussion
Yeah but ... online doesn't count. I would say the easiness of finding one's tribe online is making us picky about real world acquaintances.
Online, 99% of my interactions are with bitcoiners. In the real world, if knowing bitcoin was a precondition, I'd filter out 99% of the people I bump into.