The study estimated that 3.1% of people gambling between 8am-10pm had severe gambling problems, increasing to 7.3% between 10pm-12am, 12.1% between 12am-2am and 22.6% between 2am-8am.A further 41.8% of gamblers playing between 2am-8am were classified as moderate risk of gambling problems. Free Fruit Machines. Of course, free fruit machines are the