4 this year, the evening before their anniversary, they embarked on a carefully planned adventure – gambling at 93 casinos in Las Vegas and surrounding areas. The two were both from the Atlanta suburbs, where they met. “Our marriage is old enough to gamble,” they wrote on their website. Before they knew it, John, 49, and Kristina, 42, had mapped out an experience for their 21st anniversary that surely they wouldn’t forget. What started as silly banter about world records among two married gaming industry consultants and webmasters quickly grew legs. Las Vegas gaming consultants and webmasters John and Kristina Mehaffey have receipts – slot tickets from all the casinos they visited in a 24-hour period. Their world record isn’t officially endorsed by Guinness, but it’s unofficially real.