The Sky Lounge is a café and restaurant on the top (11th) floor of the Double Tree Hotel, near the Central Station.
It is particularly well-known for its nice views, overlooking the old town of Amsterdam on one side, the IJ and Central Station on the other side.
There is also a roof terrace.
Food and drinks are not cheap here (but WiFi is free).
Skylounge restaurant
Skylounge view
Skylounge, old city view