Atlantic City’s casinos and racetrack sports betting outlets are bouncing back convincingly from financial woes brought on by the coronavirus pandemic, taking in 31% more in August than they did a year earlier, after COVID-19-related closures ended. Figures released Thursday by the New Jersey Division of Gaming Enforcement show the nine casinos and three horse tracks that offer sports betting won $427.6 million in August, compared with $326.3 million in August 2020, the first full month of restored casino operations after a 3 1/2-month shutdown due to the virus.