Have all the people in your circle in one place, speak to all of them or have a 1 on 1 chat.
Post anything on the Bulletin Board which can be seen by everyone in the circle
Create Rooms and invite only select people from your circle. People can also request an invite.
Discover and join new Rooms
Post Messages, Photos and Albums on the bulletin board or in Rooms
Poll your entire Circle or only a sub group in Rooms