I am a member of a fraternal order similar to the Masons (
https://odd-fellows.org/ ). It's great because:
* There are standing meeting nights that I can go to for social contact
* It does good work in the community
* It lets you meet folks outside of work circles
* It lets you have an opportunity to build soft and leadership skills
* If I have to leave for a while because of work or other time commitments, I know I can rejoin in 1, 5 or 10 years and be welcomed back.
Highly recommend. Even easier if you can get a group of folks to join. And most of the older members I chatted with were thrilled to have new members.