In this June 18, 2019 photo, gambling chips sit on a a gaming table at the Ocean Casino Resort in Atlantic City, N.J. How to keep chips clean is one of many issues with which U.S. casinos are grappling as they prepare to reopen after shutdowns due to the coronavirus outbreak. (AP Photo/Wayne Parry)

This Oct. 8, 2019 photo, shows the screen of a slot machine at Resorts Casino in Atlantic City, N.J. How frequently slot machine surfaces should be wiped down, and how far apart players should have to be from each other are among the issues casinos are grappling with as they prepare to reopen after being shut down due to the coronavirus outbreak. (AP Photo/Wayne Parry)

In this June 20, 2019 photo, a gambler plays a slot machine at the Hard Rock Casino in Atlantic City, N.J. Casinos in several states are considering safety measures including turning off every second or third slot machine in order to keep gamblers separated once they reopen from shutdowns mandated by the coronavirus outbreak. (AP Photo/Wayne Parry)

In this Feb. 22, 2019 photo, gamblers play slot machines in the Golden Nugget Casino in Atlantic City, N.J. Every second or third slot machine might be turned off or made inaccessible in some casinos as they adapt to the coronavirus outbreak in preparing to reopen. Many casinos plan more frequent sanitization of slot machines once they reopen. (AP Photo/Wayne Parry)