More than 800 Belgian bar owners and their supporters demonstrated Saturday against a decision to widen a smoking ban in public spaces to cover all cafes and the kingdom's nine casinos from July 1.
The demonstration in Brussels was organised by the federation of cafe owners and restaurateurs, which claims that 4,000-5,000 of the country's 12,000 cafes are threatened with closure by the new legislation.
Smoking has been banned in work places, restaurants and pubs that serve food since 2009, while temporary exemptions had been granted to casinos and cafes that only serve snacks.
The court decided to lift the exemptions but gave establishments until June 30 to "adapt to the general smoking ban."
The judges ruled that the government failed to prove that pubs would be harmed by a general smoking ban, saying that drawing distinctions between establishments was actually harmful to competition.
The court also stated that the protection of the health of employees and non-smokers should apply to casinos even though they serve a "specific" clientele.
Bar owners fear loss of turnover of up to 50 percent, and warn of a knock-on effect on breweries and other suppliers. They want the option to declare their premises smoking or non-smoking.