Femke Halsema, the mayor of Amsterdam, is understood to be investigating measures to deter tourists from overcrowding the canal-side streets of the city’s historic heart, which includes the red light district.
She commissioned a study looking at how many people are drawn to Amsterdam because of coffee shops selling cannabis, the city’s legal prostitution zone, and by budget flights.
The survey, by the Research, Information and Statistics Department, revealed 34 per cent of people would visit the city less often and 11 per cent would never go again if they were barred from entering its coffee shops.
Almost half (42 per cent) of Britons said they would visit less frequently, and 12 per cent claimed they would never return.
Of the tourists who would keep coming, 40 per cent said they would refrain from using cannabis.
Those who would continue to use the drug said they would find another way to buy it, including letting someone else go into the coffee shop (22 per cent).
Walking and cycling through the city was the most frequently mentioned main reason people said they visit the city (32 per cent), while coffee shops were cited by 22 per cent as the main reason.
However, the study said: “For British visitors, coffee shops are by far the most frequently mentioned main reason to come to Amsterdam (33 per cent).
“They cite walking or cycling through the city less often as the main reason (21 per cent) and more often indicate cheap travel as the main reason (11 per cent compared to six per cent on average).”
The city’s government has also announced a ban on guided tours of the red light district in a bid to tackle over-tourism and to clean up and protect workers in the red light district, which is a magnet for rowdy visitors.