Currently breakout rooms cannot be renamed, they're automatically named 'Room 1', 'Room 2' etc.. Customer expressed it would be a great add-on if breakout rooms could be named like like they do in Go...
This feature is currently available in GoTo Webinar. When enabling Breakout Sessions, Click directly on the Breakout room which will enable a highlighted box where you can change the name of the room.
Note: Main room name can not be changed.