[Update: changed links so each shows events in the office’s local timezone, rather than GMT.]
Mozilla’s wonderful Workplace Resources team are maintaining public calendars for the events going on at each Mozilla Space. If you live near one of these, you might want to keep an eye on it. Each has a .ics feed linked from the bottom corner. (Note that not all these calendars may be in use yet; they are proactively created for each space as it comes into existence.)
I didn’t even know we had such a calendar for Paris.
Oh, this could be useful. Do you happen to know how we can get events listed on the calendars?
I assume you would contact the receptionist or secretary or other WPR employee responsible for the office in question.