Hm ... I kinda like this idea. We'll need to think about it some more.
Especially since the registration system already contains functionality for forming room groups, sending email invitations, etc. We used that part when EF was still run in a youth hostel, and MMC, the other convention using the same system, is still using it.
It will need some adaptation, because in the end the main contact for the room still needs to inform the Estrel about the room partners.
Noted, with no promises of course.
Thank you for the suggestion.