We are looking into integrating online community tools (like buddypress, peepso):

• members can open closed and public groups
• groups have mailinglist functionality, ideally posts to the group can be created by email and send out by email (such that the users don't have to learn a new platform, if they do not want to)
• members can set up events
• members can see / are informed over events in their proximity
• members can set up profiles, have virtual friends and exchange messages

Ideally, the system would play together with CiviCRM. Has anyone thought about such a thing? I found only some non-integrated approaches to sync CiviCRM groups to mailman.