Have you tried looking into whether or not your local community college offers any seminar classes? I took a couple seminar classes at university and a couple at a community college and they were great. It's a class format where there is generally a small lecture up front about the course materials followed by a discussion where everyone is allowed to participate and lead the discussion in any direction(within reason of course). From my experience it was mostly young people at university, but had a good mix of ages at the community college. I think I learned more from a single seminar class I took on history than I did from my two years of traditional history classes in college.