I'll try to be as exhaustive as possible.

With Palabre, you can :

• Have multiple Rooms

• Each Room can have any parameter you want ( A title, a lock, operators, any flag, ...)
• The creator of the room can change this parameters
• The room can have Sub rooms (or child rooms)

For Example, you can host 10 games and chats on a server, and each game has a lobby room for chatting, and as many subrooms as wanted. Players can chat, start a new game, wait for people to join, and then start the game. (Then the child room of the game can be "locked" so that no one else joins it.

• Have multiple clients
• They are identified by a nickname (like on IRC)
• One client can be in multiple rooms / subrooms
  
• Clients can send messages to a room
• Clients can send messages to other clients (private messages)
• Clients can send a broadcast message (or reserve this to root)
  
• Clients can ping the server
  
  
• Clients can ask for a "room message" to be sent back to them. (to test latency, ...)