Making a hash of it.
The new law for bars and restaurants means that coffee shop customers can still smoke joints as long as they don't contain tobacco.
Gus Van Tiel, of Youth Against Drugs, said: "We now have the ridiculous situation where people will be getting even more stoned than they did before because they'll be smoking neat cannabis.
"When we are trying to reduce the potency of the drugs people use, this seems to be totally insane."
Cannabis is still technically illegal in Holland but coffee shops are licensed to sell small quantities of the drug to customers over the age of 18.