coffee shops are not the same as coffee bars
Coffee shops are not allowed to advertise. Still it is easy to find them.
Here is a list of coffee shops I can recommend.
Expect to pay anything from ¤5 to ¤10 for one gram. If you are new to weed, you can also buy a pre-rolled joint.
Dutch coffee shops are licensed places that sell hash, cannabis and marihuana. Soft drugs are illegal in the Netherlands but everyone over eighteen is allowed to possess 30 grams of weed.