So in researching the Madrid Meetup it looks like the ones that have happened so far have been organized by hackers and then supported by the founders. It seems we can make them come to us.
In the thread for the New York meetup, co-founder Robin mentioned it was a shame it wasn’t in Toronto. We could try and plan one here. We also have a fair number of contributors in the UK, we could try and plan a London Discourse Meetup. In both cases we could use the Moz offices for the location.
I guess a good first step in either case is to post on the Discourse meta forums to ask if there are others interested in either location.