4 hours in Amsterdam

[guller]

So my work is sending me to the Azores and on the way I have 4 hours to kill in Amsterdam. Is there anything to see or do close to the airport? Any good bars I need to see?

On the way back I will have to kill 8 hours in Lisbon, Portugal between midnight and 8am. Last time I went there we found the Hard Rock Cafe but that was pretty much the same as the states and it closed pretty early. Anything else here?