{% for room in timetable.rooms %}

            {% with room|trackname:timetable.day as track_name %}

              <th class="track-name">{% if track_name %}<p>{{ track_name }}{% endif %}</th>

          {% endfor %}

        </tr>

      {% endif %}

                        <em>Session chair:

                        {% if not session.chair %}

                          <a href="{% url "schedule_session_detail" session.id %}">Volunteer! 🙋</a>

                        {% endif %}</em>

                      {% endfor %}

                    </div>