Basically just like real life, before entering a room on Teamspeak, if you right-click on the room you should be able to click an option “Knock”. This will send a notification to the users in the room saying “Username has knocked on the door”. Everybody in this room will then receive a prompt to let the user in the room, either denying or accepting entry.
How this may go in real life if implemented:
-User knocks on the door
-People in the room get a notification
-Someone clicks “Let user in the room”
-User then gets automatically moved into the room
This would be useful for big communities where Teamspeak rooms are used for important conversations or private matters. Of course, in the settings it can be enabled/disabled in certain rooms.