Have you found any online communities with excellent interfaces? Ideally open-source?
Unless discourse has an "inline recent posts" view? That would be superb, for users not willing to commit by default to clicking on a post. It's amazing how big a difference that can make, with the scroll-happy click-averse folks trained on Facebook.
(I'm developing this, and tweaking it a bit, maybe adding a config option so it becomes even more like the Facebook feed, is maybe something I should consider, hmm)
If you look at it on a smaller screen, like a mobile, it'll look a little bit even more like Facebook, ... but maybe more text from the posts should be included.
https://www.effectivediscussions.org/
It also includes chat features from Slack, and features from HackerNews (threaded comments) and StackOverflow (question-answers), + some improvements over HN & SO: https://www.effectivediscussions.org/-32/how-hacker-news-can.... (I'm developing it.)
We ended up using NodeBB because the person who was going to maintain it was more comfortable with Javascript than Ruby.
Roll your own!
It just does not work for me for having proper discussions (it does have a ton of other features which do work great, but not that). Reddit is sort of ok, if you find the right community. And many of the forums I already visited before there even was a Reddit or Facebook stil exist nowadays and some of them are even more alive than all those years ago. Most of them are specific (eg. one sport, one music style), the general ones are mostly gone.