This will by our (my wife and I) second trip to Amsterdam, but this time under much different circumstances. First question - what time do the coffeeshops open usually? Second - how long is the train ride from Schipol Airport to Centraal Station? On our way back through Europe, we have a 5 hour layover in Amsterdam and we want to hop over to the city and smoke a bit before we have to get on another plane to the states. Does this sound feasable??? Lastly, We're thinking about staying in a Hotel called 'Citadel'. Anyone heard of it? Any suggestions? We'll be there for Queens day weekend at first. Thanks guys in advance.