Join Date: May 2004
Location: formerly Gold now Diamond, formerly MSY, now LAX, formerly NW, now DL
Programs: Hyatt Plat, Hilton Gold, SPG Gold, Delta Diamond/1MM
Posts: 4,732
Also Amsterdam is a mere few minutes away by train too but I'd just stay at or near the airport given your times...
If you are feeling energetic, get in train into town, drink party until dawn, get back on the train and avoid the hotel completely! You can shower at the Mercure, they have facilities for the passing traveler, which is located between lounge 41 and 52 on the upper level on the international side of AMS