Hydra includes not only cool talks, but also a party for all attendees!
Party with beer, snacks and music to chill out after a busy day. You can drink with your favorite speakers and colleagues, talking casually about this and that. The nice, relaxing atmosphere feels just right.
Discussion with no "speakers" and "listeners": debate, discuss, agree or disagree. The very secret place to discuss things that are not to be published. You know, "Birds of a feather flock together".
Hydra 2019 had two parallel BOF sessions: