Any good clubs/ memberships or weekly events that are good for meeting people and making friends in Dublin?

I have many friends, but ever since getting to my mid twenties it's difficult to get everyone out the same week or find days where people are free the same hours as me. Different living conditions, careers, spouses, children etc. just means that instead of having a "group of friends" like I used to, I now go out once a week with one or two friends on a rotational basis. But it means that I could go 6-8 months without seeing a particular friend and that every night out with someone feels like a catch-up and that there's a constant distance between friends.

I would love to have an event or club/ membership type thing to go to where I can meet a group every week on top of that, getting to know people who I'll see regularly weekly or monthly. Hopefully I'm making sense here.