An inbound tourismsurvey last year found that 14% of all tourists to the Netherlands head to coffee shops, with 30% of Spanish tourists, 19% of Italian tourists and 19% of American tourists paying a visit while on their holiday.
The warning came with publication of the Blueprint for Tourism, the most comprehensive survey ever undertaken of the tourism and leisure sector in the province.
The survey also indicated that Scottish tourism suffered over the summer months, with more than half of hotels reporting a fall in visitors during the three months to the end of September.