Those events usually aren't the ones where most of the attendees are presenting, though sometimes things like Bar Camps can get the venue etc. sponsored. Finding sponsors to foot the bill can be harder for conferences for academics who aren't interested in leaving their tenure-track position to configure Kubernetes at a hot new Uber for Guinea Pigs startup.

Still, church picnics, potluck dinners, and wedding parties usually don't cost US$600 a person. Do we really need the Anaheim Convention Center or the Four Seasons Hotel to hang out and chat about capability-secure hardware architecture or isopiestic measurements of deliquescence points? Or could we maybe pitch some circus tents in a field somewhere and rent some folding chairs and tables? Instead of whiteboards we can use 4'x8' melamine sheets.