There is a place for group events that are not official and public, just like there are both informal group rides on real life roads along with organized events there. I expect the market for informal group rides and races is far larger, by count, than the number of officially sanctioned events. Just like Charles wrote, real life groups would carry over into the Zwift world, probably bringing in some who were not Zwifting before. I enjoy the official group rides, races and workouts, and interacting with people around the world I’ve never seen IRL. But it would also be a blast to do a group ride or race with some of the riders I’ve been on the roads with around here. Especially on a group ride day when the weather outside is extra sketchy, I’d picture starting with half a dozen meeting up on Zwift, and maybe a lot more of the group would join Zwift then to try it out.
As Tom says, we can do an informal group ride like they started in earlier Zwift versions – meet up at the start finish line at 8 a.m. with course X selected. But the tools Zwift has built for group rides and races add a lot to the experience. They should be available for self-organizing groups. A group leader would set up the ride, and pass on a group password or the like to the other riders.
There’s plenty of room for both the wide open events and the self-organizing group events, just like on the roads outside. Both have their place and both build a community.