Go downstairs and have a light meal in the restaurant. Cruise to the hart of the city afterwards for some partying or for some more relaxing. Don't stay in the park after midnight for too long, unless you're up for some sexual adventure. This cafe's got a great interior. It's a former bank, but I'm sure you won't recognize a thing of that anymore.
Some people describe the atmosphere as a jungle, others as typically art nouveau.
There are many hidden corners where you can talk in private with your lover or big couches to sit on with all your friends. On Thursday evenings there's a DJ who plays relaxed music. You can start with some food and let the evening flow into a nice night of going out, listening to the DJ and playing some snooker. Keep your ears open at all times to find out whether there will be a party in the church next door or somewhere else in town. W139 is an artist organization that is situated in Amsterdam.