I can only speak from my own experience, and I’ve rarely known the people in the houses/apartments around mine. This was always a matter of random encounters that only ever amounted to small talk, of which I’m not fond.

However, I have found the most effective way to meet like-minded people is through shared interests. I’ve made extensive use of the https://meetup.com website where I’ve been able to join various groups and attend IRL events in my area.

Now, granted, I’ve only ever lived in densely-populated areas so my way doesn’t apply to everyone out there, but the principle stands.

Find local groups organizing IRL meet-ups around your own interests, join them and go to events. The shared interest will help breaking the ice.