I've been lurking on the municipal liaison forums and have been sort of following this topic. Because October 31 is a Friday, this could be feasible. And I know at least one place that could accommodate a group. But on the other hand, I'm not sure I want to do one. I'm no stranger to all-nighters; I often do 24 hour (or more) experiments in lab. But I do this because I love science and the fact that I'm sort of a control freak about my own experiments (I shudder at the idea of switching shifts with someone in the middle of something I consider IMPORTANT). Of course, if I take a nap beforehand, it won't be that bad. And it would depend on whether or not other people want to do it too...