BoFs, AKA Birds of a Feather, are informal and small meetings to discuss about a certain topìc. Workshops can be proposed in these rooms as well. Anyone is encouraged to propose a BoF or a Workshop.
You can find the proposed BoFs or Workshops underneath the shedule. If there is any topic related with Drupal that you would like to discuss, or if you want to give a practical workshop, find a free slot and room and register it.