You must have attained the age of majority (21 years) to be allowed into a casino in Belgium and registration with valid ID is mandatory at the reception. It is best to contact the casino you want to visit for specific dress codes. As a general rule, sneakers are not permitted and in some places jeans are not allowed either. For best results dress smart casual. There are nine casinos available to players in Belgium; four in Flanders, four in Wallonia and one in Brussels. The casino in Spa, built in 1762, is known for being the oldest casino in the world. Even if it is not up to its French equivalents in terms of variety of games, it still offers its visitors a range of casino games to choose from. Guests can indulge in blackjack, roulette and slot machines. The most popular game at the casino is its Texas Hold'em tournaments that takes place regularly and attract the cream of European poker players.