Book clubs and philosophy groups, but they only attract people over 45 except in major metropolitan downtown areas. Most people are unavailable all through their thirties because they're having kids.
You can go to chautauquas, but only if you live in the 19th century.
I always find it odd that parents will take their kids to all sorts of educational events, but hardly ever go to any themselves. Go to any environmental education center, and you'll find nothing but kids and parents with kids. Why do they think it's important for their kids but not for themselves?
I have not had luck with book clubs in the past, and so have not been to any in years. Are there any sort of book clubs that you have had particular luck with?
I can second university clubs -- philosophy and political science clubs have been good to me in the past, and math club was fun. These are pretty much limited to students, unfortunately. It might be interesting to hunt down a philosophy club for older adults, if I can find one that doesn't focus on spirituality/religion.
This thread is for asking the rationalist community for practical advice. It's inspired by the stupid questions series, but with an explicit focus on instrumental rationality.
Questions ranging from easy ("this is probably trivial for half the people on this site") to hard ("maybe someone here has a good answer, but probably not") are welcome. However, please stick to problems that you actually face or anticipate facing soon, not hypotheticals.
As with the stupid questions thread, don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better, and please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
(See also the Boring Advice Repository)