Look what’s going on inside this casino. Some visitors wear masks but the most ( in the background) don’t have it on the faces. And that’s when scientists warn of the danger of airborne viral particles wandering around.
Quote from: https://www.nytimes.com/2020/07/04/health/239-experts-with-one-big-claim-the-coronavirus-is-airborne.html
Casino employees may ask to wear masks at the entrance to the casino, and then come up and ask to wear those who took off inside. Easy