symposion_app/symposion/templates/schedule/_grid.html

<table class="table table-bordered table-condensed">
    <tr>
        <th>&nbsp;</th>
        {% for room in timetable.rooms %}
            <th>{{ room.name }}</th>
        {% endfor %}
    </tr>
    {% for row in timetable %}
        <tr>
            <td class="time">{{ row.time|date:"h:iA" }}</td>
            {% for slot in row.slots %}
                <td class="slot slot-{{ slot.kind.label }}" colspan="{{ slot.colspan }}" rowspan="{{ slow.rowspan }}">
                    {% if slot.kind.label == "talk" %}
                        <span class="schedule-controls"><b>add</b>: <a href="{# url schedule_slot_add slot.pk "talk" #}" rel="facebox">talk</a></span>
                    {% else %}
                        {{ slot.kind.label }}
                    {% endif %}
                </td>
            {% endfor %}
        </tr>
    {% endfor %}
</table>