The Rotterdam University of Applied Sciences' building at the Wijnhaven 99 hosts the Creative Media and Game Technology department. The perfect place for a weekend of game jamming! Located in the centre of Rotterdam, easily reachable with public transportation (from Central Station, or the subway stations Beurs and Blaak) with plenty of opportunities for a nice dinner in the neighbourhood. WiFi and power for your devices are provided on location (Eduroam WiFi network doesn’t allow p2p communication and certain network ports may be closed preventing some online multiplayer game technologies).
You can rest on site if you want to, one of the floors is dedicted as a "quite zone" for jammers that need to power up. But be sure to bring your own sleepingbag, air mattress, pillow and stuffed animals.