{% macro list_rooms(rooms) -%}
    Rooms:
    <ul class="list-group">
        {% for room in rooms %}
            <li class="list-group-item"><a href="{{ url_for("host_room", room=room.id) }}">Room #{{ room.id }}</a></li>
        {% endfor %}
        {{ caller() }}

    </ul>
{%- endmacro %}