Discord supports custom invites to game ‘parties’. Seeing as many Plex servers (that I’ve come across, at least) have an accompanying Discord server, being able to invite other Discord users to watch along with you seems like a very useful feature.
This picture illustrates sort of what’s possible.
This could probably be its own post, but maybe also allowing people you’re not Plex Friends with to join via a link (within a certain limit, of course) could be a useful feature for those without Plex accounts of their own.
