Instead of hiding the request form, disable the link after requesting a song.

marietje/marietje/static/js/queue.js

@@ -30,7 +30,7 @@ $(function () {
         $.post('/api/request', {id: songId, csrfmiddlewaretoken: csrf_token}, function () {
             refreshQueue();
         });
-        hideRequestTable();
+        $(this).parent().text($(this).text());
         return false;
     });