switching.socialYes, there's a Meetup style site called @GetTogetherComm
You can try it out at:
It's still being worked on, but it will federate with the same #ActivityPub standard that Mastodon uses.
social.giorgiocomai.eu is a social network, courtesy of Giorgio Comai. It runs on GNU social, version 1.2.0-beta4, available under the GNU Affero General Public License.
All social.giorgiocomai.eu content and data are available under the Creative Commons Attribution 3.0 license.