Sure, that's a point I've added. In Zurich, we have made the experience that while installation parties are nice and good for a chat and a beer, they don't
guarantee everyone is set up the day of the workshop. Their declared goal — avoiding any and all installation issues for the workshop — is often missed.
The resources spent on such a event can, IMO, be used much more fruitful. If you just want to meet up with the community it's still a nice idea to have some event before the actual workshops.
While I didn't hear that point expressed by someone else that strongly, nobody seemed to disagree.
Cheers,
Robert