Amsterdam here. I'd be interested in a meetup, but I just organized a meetup (non-HN) that went pretty horribly by most standards (people pledging to come and then bailing).
But what the heck...
Delft, The Netherlands.
Meet up: don't know, I'd be interested though.
Rotterdam, but I work in Delft.
Live in Delft, work in The Hague.
Rotterdam, home of many a gabba track. Man, I miss that kind of music.