For those of you that have indicated to require a hotel room, a room has been booked at hotel Casa (located here). You have received the booking confirmation via email.
Check-in is possible from 15:00, check-out is required before 11:00.
Travel to hotel Casa: Hotel Casa is located a short walk from Amstel station.
From Amsterdam Schiphol Airport
To get there from Amsterdam Schiphol Airport, you can take a train. This will require 1 change at Amsterdam Centraal. Trains run very frequently; exact times can be found here.
Train tickets can be purchased at yellow machines at the airport, or using a debit card to check-in and check-out.
From Amsterdam Centraal
To reach hotel Casa from Amsterdam Centraal Station, either take a train (see above) or a direct metro (lines 51, 53 and 54). Metros run very frequently. Ticketing works via check-in and check-out at the entry and exit gates.