Main venue: Van Der Kunstraat 12, Den Haag (link Google maps)
Sunday afterparty: Bleyenberg, Grote markt 10, Den Haag (link Google maps)
Main venue is 7 minutes walk from the station. From Amsterdam airport take a direct train to Den Haag HS station (29 minutes, trains run 24/7). Railway info: www.ns.nl
The city center is a few tram stops or 20 minutes walk.