Instructor Daisuke Sato performs a turnover of a deck of cards on a black jack table at Japan Casino School in Tokyo, Japan August 4, 2018. Picture taken August 4, 2018. REUTERS/Toru Hanai

Instructor Daisuke Sato spreads a deck of cards on a black jack table at Japan Casino School in Tokyo, Japan August 4, 2018. Picture taken August 4, 2018. REUTERS/Toru Hanai

A ball is seen in the spinning wheel on a roulette table at Japan Casino School in Tokyo, Japan August 4, 2018. Picture taken August 4, 2018. REUTERS/Toru Hanai

A man stacks chips on a black jack table at Japan Casino School in Tokyo, Japan August 4, 2018. Picture taken August 4, 2018. REUTERS/Toru Hanai

A man walks past a World Cup anti-gambling advertisement at a taxi stand in Singapore July 9, 2014. Singapore has scored an own goal with the World Cup anti-gambling ad which features a crestfallen boy telling his friends his dad bet his life savings on Germany - who have just reached the finals by thrashing host nation Brazil 7-1. REUTERS/Edgar Su (SINGAPORE - Tags: SOCIETY SPORT SOCCER WORLD CUP)

A young croupier trainee turns the roulette at a gaming table at the Cerus Casino Academy in Marseille November 6, 2013. Cerus Academy is the only school in France authorized to issue the official croupier certificate. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SOCIETY BUSINESS EMPLOYMENT)