Hotels and hostals are fully booked, and if you do find availability, then be prepared to pay premium prices (up to €80 per person per night for a hostal)
I strongly suggest you try to stay for free with couch surfing...
this is the party itinerary for new years...
on the 30th:
Club crawl: Free entree to 6 clubs, unlimited vodka shots for half an hour, one free drink in every place (beer, wine, soda)
on thee 31st:
New years Party! unlimited vodka shots for half an hour, entree to 4 bars (most bars have an entree fee in new years), one free shot in every place, free bucket of vodka and fire works, and free VIP entree to a private party
on the 1st:
Booze Cruise! party aboard with unlimited drinks for 2 hrs (beer, wine) as we cruie through the canals of Adam
bye bye 2011
for more info
places are limited about 6 years ago