It's a 1 out of 9. For a variety of reasons, groups or organizations or locations lead to sociable interactions maybe one out of nine times. (I have in mind the beginning stages of friendship but even that may be expecting too much)
For example, when I was a member of Amnesty International, well, it's already heavy, serious issues. People may not go there wanting serious philosophical conversation on top of this.
Or, perhaps for many people going to a group is like going to the movies. You're not really looking for conversation with the person next to you. (Funny aside, I think I saw 'Vanilla Sky' on my birthday in 2002. Theater was not very crowded. Woman one seat over asked me if I knew how long the movie would last more, for it was a long one. She said something else. As we were leaving, I asked her to coffee. She nicely declined. So, point being, it can happen. Just kind of rare bird.)
In 1990, as an American citizen, I protested my country's buildup to war in the Persian Gulf, and in 1991, I protested the war itself. You'd think as part of a protest movement, you'd meet all kinds of people with shared values and be part of a community. It was very disappointing to me that this did not happen. I later decided, okay, people have heard enough stories about FBI spying and informants and all that, to shy away from anyone weird or different. And it didn't help when I overtried. More charitably, people have gone through a recent growth period to get to the point where they feel ready to take the step of protesting their own government, and now they're in more of a consolidation period regarding the previous growth. And so, as someone wanting to talk academic philosophy (as I did during that time), that was probably kind of off-putting.
So, I decided for myself, as far as meeting people, light touch a variety of groups.
This is a little bit of a down period in my life (including employment which is a big deal)
I do have the beginning stages of a friendship with a good guy I've met at an informal chess club. And this is a gift.