Call it a server, then. Tons of people already call them Discord servers. And it’d be a lot more true of Flotilla than Discord. Functionally, from a UX perspective, there’d be VERY little difference to an end user. You’d get an invite somehow, probably through a link, maybe combined with whitelisting your identity for more private communities, and you’d be in, using a client remarkably similar to Discord once it’s in a good spot. For most users, they can fully ignore the technical complexities.