Ok, I'm back (with questions).
I love this idea in theory but I have a bit of a concern about attendance. We only had 4 people (not counting me and Luke) join the hangout with Don Norman! If no one takes advantage of an opportunity that huge then it doesn't feel likely that many will bother when we don't have an amazing guest. I could be wrong, but the idea of organising a hangout that no one attends (or has anything to contribute) is a bit disheartening.
What are your thoughts on making bookclub a part of our monthly theme? We could choose a book that relates to the theme, give people a month to read it, organise an event/hangout, a book review, related articles etc. That might add more value and give people more to think about/other ways to contribute.