Maybe the more interesting question is what does it take for this to work?

I’m just going anecdotal here from college friends that have dispersed across the US.

Warm intros, so to speak, help. If you join a running group attended by a friend of a friend it seems to stick better than joining when you know absolutely no one.

Public transit helps. It’s hard to be consistent when going to the activity requires slogging through traffic.

And lastly, an activity that encourages repeated regular attendance. Hiking is an activity that is super flaky attendance compared to say training for a triathlon with a specific event day.

In my experience the reason board games work great is because you are forced to interact, understand the people, you play better when you figure out how they think etc. It forces you to create a rapport. You inevitably find out when you have chemistry with someone and want to play more with them.

Most people meeting over other activities I believe have similar stories. Dancing for example, or other group sports.

Shared experiences are key. If you've ever been on a tour with randos you'll know. You will form friendships with all kinds of people you never would have expected to back home.

I've made some very good friends since leaving university. The simplest thing to do is to start with something YOU enjoy. Food, sports, music, pottery, knitting, boardgames even coding (gasp but that's our work).

If you have a passion and you want to be there, and so do the other people - the odds are in your favour that you'll get along.