New Jersey Sports Bettors were busy last month, with three casinos and two racetracks taking in $40.6 million in wagers in July, the first full month it was legal. Those figures were part of a report that showed that Hard Rock debuted as Atlantic City’s No. 3 casino in terms of gambling revenue out of the nine casinos in town. Ocean Resort came in last in its first full month of operation. New Jersey won a U.S. Supreme Court case in May clearing the way for all 50 states to offer sports betting if they choose. Since betting began in…