An example use case would be needing one person each from two different disciplines (HR and Engineering) (Sales and Support) (Management and Marketing). You would be able to set up a single link, pick one group of attendees to be in Round Robin A (orgainzer) and another group of attendees to be in Round Robin B (non-organizer). It would be even better if these groups of attendees could be saved and reused, so instead of building a round robin group of sales people, you could just add "Sales Team" as an attendee and it would automatically do a round robin for them.