It was very worth it for me. The Keileweg is already mentioned in the FAQ but there are some bars near the Westplein in the center. This brothel is not very luxiurious but the prices are low. The customers are received in a small, simple room where a porno video can be watched. This money has to be paid in advance to the manager but if you want to see the girls first that is no problem.
Drinks seem to be included in the price.
There were only two girls present when I visited the place, both neither beautiful nor ugly. The other girls were said to be engaged in escort services at the time. She turned out to be worth every cent of my 100 guilders. I had a great, long fuck and finally went home totally satisfied. To enter the place you'll have to pay 50NLG which include 5 drinks of your choice and unlimited permanence.