I've tried a few types of churches of reason and they are pretty sad, honestly. Hard core, dedicated, non-religious person here, so I'm not saying that people should go to Church, but I've never seen anything approximating a Church of Reason that would have satisfied my (admittedly minimal) social desires.

I hear you. For me things that have worked are those that are built around a hobby -- travelling to the wooded hills, astronomy, music recitals, caring for strays / abandoned pets.

Try https://www.sundayassembly.org/