Meta Horizon Worlds is testing members-only worlds, enabling the platform to be used by clubs, groups, and communities.
Members-only worlds are progressing to a closed beta after beginning as an alpha test in January. They're persistent, so continue to exist even when no one is online. Creators can choose to publicly list them so anyone can place a request to become a member, or set them as unlisted so membership is only available through invitation.
Each world can have up to 150 members, of which 25 can be online concurrently.
Members-only worlds are moderated very differently to public worlds. World creators can assign other people as moderators, and can decide to only allow the world to be visitable when at least one moderator is present. Members can file reports of rule breaking to a dashboard the world creator and moderators see, instead of only being able to report to Meta.
Meta says it will "slowly roll out the ability to create members-only worlds to a randomized group of people".