Create a post under "Ask HN" or "Tell HN". A few years ago I was in thread where it turned out that a couple of the commenters lived in Zurich. We thought a me

Create a post under "Ask HN" or "Tell HN". A few years ago I was in thread where it turned out that a couple of the commenters lived in Zurich. We thought a meet up would be a nice idea and created such a post. Maybe a dozen people met up in a public place for beers and chats. The effort was totally minimal and you'll find that enough participants live in Amsterdam and enjoy hooking up for such a gathering. The only challenge, I think, is to find a public venue, which offers enough space for such an impromptu meetup. In the Zurich case we met at http://www.ziegelohlac.ch/ http://www.ziegelohlac.ch/ (sorry, page in German) which offers enough seating and when the weather is nice, seating is essentially unlimited. How do you identify the group? Well, we just scribbled it on an A4 page. But that wouldn't even have been necessary. You know them when you see them. Good luck.