Funnily enough there is a Hive Rally site that does something like this, but that community does not seem too busy. I think 3speak has some method to set up such community sites relatively easily.
I think the original idea of this blockchain thing was to be a substitute for reddit, but it lacked communities at the start. I think they hold a lot of potential as you can have an area with moderation to keep it on topic. We need to persuade communities to move over from reddit and FB, but they need some incentives.
I think it is vital to let new Hivers know that there is a broad ecosystem here with lots of communities and games. InLeo may be bringing DASH people, but they will have other interests.
I think we missed an opportunity when Splinterlands was creating thousands of accounts that may never have even looked at the blogging side. I understand that a lot were bots, but there would have been some people in there too. A while back it was hard to find mention of Hive on their site, but it is more prominent now.
The Hive brand needs to be better known as an alternative to the corporate platforms.