The hotel (Valpre-Lyon) was absolutely beautiful with large grass areas, great architecture and a place for you weather you wanted to have a large or small discussion, sit quietly or sit outside. As well as Pétanque, table tennis was also available as well as plenty of people to meet!
Some of the hackathon grounds. By Alex Cella (Own work) [CC BY-SA 4.0], via Wikimedia CommonsI planned on primarily hacking on my MassAction extension along with one of two others but as at any hackathon I got massively distracted talking to people and working on other projects.