Description
A group of groups for groups to reach other groups :-)
There's also a Public Calendar where you can post your open events!
https://calendar.google.com/calendar/u/0?cid=Y2t0N3BhNWRsMm9nZXV0amM0ZzI0Nmg5YWdAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ