Random matchmaking

It's also possible to employ a form of random matchmaking. That is, by supplying the special room ID "$service-room$" to CreateJoinRoom, you will connect the user to so called "Service Rooms". A service room is a room with a randomly created ID, and a new room will only be created when the existing service rooms are all filled up to 75 percent (this gives some leeway to move users between rooms). By using CreateJoinRoom, the client will create a room if it doesn't exist, or join the existing one if it does.

void OnGUI()
{
  if( roomConnection != null )
    return;

  if( GUILayout.Button( "Join Random", GUILayout.Width( 200f ) ) )
  {
    client.Multiplayer.CreateJoinRoom( "$service-room$", "MyCode", true, null, null,
      delegate( Connection connection )
      {
        Debug.Log( "Joining room" );
        roomConnection = connection;
      },
      delegate( PlayerIOError error )
      {
        Debug.Log( error.Message );
      } );
  }

  if( GUILayout.Button( "Create...