old_contents: $(document).ready(function() {
  
    table = new Table();
    tableView = new TableView({collection: table});
    $(".tableclass").append(tableView.$el);
  
    // listen for drag
    socket.on("addCardToTable", function(){
      $(".single-card").draggable();
    });
  
  })
  
new_contents: $(document).ready(function() {
  
    // instantiate table views
    table = new Table();
    tableView = new TableView({collection: table});
    $(".tableclass").append(tableView.$el);
  
    // instantiate message view
    messageView = new MessageView();
  
    // listen for drag
    socket.on("addCardToTable", function(){
      $(".single-card").draggable();
    });
  
  })
  
subject: add instantiation of messaging view of table init