I have been to a few Wikimedia related conferences and hackathons. Wikimedia Developer Summit 2016 was surprising organized as an open space conference, a format I am familiar with and really like. Make code review not suck session was the most interesting one.
At the end of the first day we split into smaller groups and went to restaurants for dinner. I really prefer that over going as a big group and overwhelming a restaurant. Of course, I have joined a group that was going to ThirstyBear brewery. The second day the food and beer was served by Old Bus Tavern.