Poldercon in Utrecht, the Netherlands. Each year around february. more of a participation day, with many games you have to sign in for to play, with 4 sessions during the day. Many great tables and very diverse games are being hosted each year. There are some vendor booths, but obviously not as much as at, for instance, Crisis Antwerp.
I just saw there are no reports for 2016 and 2017 on the web site but it was brilliant I was there.
Interpuction, or was your being there truly an achievement?