What about climbing gyms, run clubs, book clubs, gardening clubs, bars/trivia, etc? If you're near a city, almost any of these will be an option. And if you're not, a high percentage of those people are probably still going to church. It seems there are still a lot of opportunities out there for regular communion with others.
Hobby clubs are better than nothing, but religions have much better structure to keep community members in check and check their mental health regularly.
