What are gallery chat rooms?
Chat rooms are typically public and open to all. A gallery chat room allows anyone to enter, but only specific users may talk in the room, as determined by the room owner.
When should I create a gallery chat room?
When you wish to have a controlled conversation between specific community members, without anyone else interjecting.
How do I create a gallery chat room?
Visit:
https://chat.stackexchange.com
Click create room, then select the gallery option. Visit the info panel of your room and use the access tab to grant talking privileges to other users.
What happens when another user enters the room?
They will be able to read the conversation in the room as it happens, but they will not be able to talk until you, as the room owner, grant them the rights to.