There was one group I used to attend where I was definitely not as interested in the topic as others. I recall someone at the meetup said to me something along the lines of "If you don't agree with X then why are you here?" Well, I attended because I found a lot of interesting people there, and I know I wasn't the only one. Some organizers made the meetups unstructured conversation, which was great for me. Honestly, I'd just like to meet other people interested in a particular topic. Other organizers preferred meetups with more specific assigned discussion topics. I rarely cared much about the assigned topics and they made the unstructured conversation I wanted to have much more difficult or even impossible (particularly for the online meetups). I don't attend those meetups any longer in part because of the assigned topics.

1. The club/etc follows its core conceit closely, and discussions and such naturally don't branch off far

2. Connected to 1, the folks who actively engage in a club are typically very invested in the subject; when my interest is more casual, it can be difficult to connect with those more passionate

And 3., most critically, the things I am passionate about are too niche to sustain dedicated clubs anywhere but the most dense of population centers, which for a variety of reasons I have no interest in relocating to.

I would appreciate a group where a variety of unique interests is encouraged. I enjoy interacting with people who are passionate in their own ways, even when they don't necessarily line up with my own passions; I realize there are clubs and such out there which likely fit my preferences, but I have yet to find one reasonably nearby.