End a webinar for attendees, but organizers and panelists remain logged in.

I often host webinars with external bodies as presenters. It would be great to be able to end the webinar (stop broadcasting) and be able to have the organisers still on to discuss the webinar with the presenters, instead of having to arrange some other way to communicate when we're all already on the line. This could also be useful for go-to-meeting, as many meetings in my workplace will continue with the senior staff once other attendees have left.