how to connect to multiple hubs in same time signalr with mvc 4

[HubName("chatHub")]
   public class ChatHub : Hub
   {
       private readonly int TimeoutInSeconds = 30;
       private readonly Chat _chat;



       public ChatHub()
           : this(Chat.Instance)
       {
       }

       public ChatHub(Chat chat)
       {
           _chat = chat;
       }

       public void Join(string myName)
       {
           if (Chat.Clients.Where(x => x.Name.Equals(myName)).Count().Equals(0))
           {
               Chat.Clients.Add(new Client() { Name = myName, LastResponse = DateTime.Now });
               SendMessageServer(string.Format("{0} entered the chat", myName));
               GetClients();
               Caller.Naam = myName;
           }
           else
               throw new Exception("This login is allready in use");
       }

       private void GetClients()
       {
           _chat.GetClients();
       }

       public void SendMessageServer(string message)
       {
           _chat.SpreadMessage(message);
       }

       public void SendMessage(string message)
       {
           if (Chat.Clients.Where(x => x.Name.Equals(Caller.Naam)).Count() > 0)
               _chat.SpreadMessage(string.Format("({0}) <b>{1}</b>: {2}", DateTime.Now.ToString("HH:mm"), Caller.Naam, message));
       }
   }

$(function () {
    var chatHubClient = $.connection.chatHub;


    // Send a new message to the server
    $("#SendMessage").click(function () {
        var message = $('#textMessage').val();
        chatHubClient.sendMessage(message);
        $('#textMessage').val("");
    });

    // Start the connection
    $.connection.hub.start(function () {
        chatHubClient.join('@Model.Name');
    });

    // Receive a new message from the server
    chatHubClient.newMessage = function (message) {
        message = $("#chatWindow").html() + "<br />" + message;
        $("#chatWindow").html(message);
    };

    // Receive the new active userlist
    chatHubClient.userList = function (message) {
        message = JSON.parse(message);
        var options;
        $.each(message, function (index) {
            options += '<option value="' + message[index].Name + '">' + message[index].Name + '</option>';
        });
        $("select#users").html(options);
    }
});