Casual sports for adults.
You local maker space.
Having friends over - for a while we used to host a Sunday dinner and have guests over weekly (pasta and sauce is cheep and easy).
For myself kids, and their demands in modern America pretty much killed all of these things off for me... Now my rituals are their activities.
My parents dedicated their entire lives to me. It was all about me, and nothing for them. While I'll be forever grateful for what they've done for me, I find myself struggling building a meaningful life as an adult. I seriously think my life now would be dramatically better if my dad did something as simple as go play soccer himself once a week when I was growing up (and occasionally have me watch him play).
Church is every week, at the same time, with enough people involved to have a consistent community – even if individual members don't show up consistently.
Every day, in many cases, though perhaps considered obligatory only slightly more than once a week.