Making a Screening Room with OBS.Ninja
Using the "transfer" feature to move users between group chat rooms allows the director to dynamically group users into public and private rooms. Great for call-in show style show formats, where you might want to limit who is allowed to enter the green-room or who is live on air.
This is more secure than adding and removing guests to scenes, as a guest won't know which room they have been transferred to. They won't be able to re-enter the secret room or share access to the room with others, as they won't know the name of the room.