Some say that the Covid tests are expensive, and I will attest that information is true in my area. A covid test that is being administered on a private hospital and that is not supported by government costs 175 U.S. Dollars give or take. So it is not really like a free thing as many people would think. The government can only administer a million or two but imagine how much taxpayer money it uses.
A rapid test is kind of cheap but that isn't recommended since it can't actually detect the virus.
Swab test is expensive and costly but as far as our situation here in our country is concern, the expenses should be covered by employers (for employed and that's mandatory) or by a local government unit. Supplies are also limited that's why for average people, it's not recommended to undergo a test unless they feel symptoms.
Going back to the topic which is resuming of Las Vegas Casinos and reading a few replies back, I can't see that a casino will mandate or required their customers to show test results before they will be allowed to enter the casinos. Let's accept that there is no way a certain place will prevent any infection especially for a country that establishing hundred thousands of confirmed cases daily so I'm hoping that all casinos there is strict, not that strict but too much strict in implementing safety measures.
That thousands of daily infections, that's too high and that's the reason why USA is leading now for most number of cases.
It could be costly actually, I am even seeing that but costly if they afford then why can't they implement it? But then, I understand your point, you are looking at the overall that not all gamblers who wants to go inside the casino can afford it, the moment they spend for the "swab testing", they already spent so it could be considered as part of their loses already.
Even if the swab tests will be implemented on casinos and gambling areas, and the casino patrons religiously follow the health protocols, there is still chance that someone might get infected along the way and will cause problems infecting other people. I just learned that the covid tests have something like an expiry date, for example if you took a test this day and your result would be negative, it doesn't mean that you will stay negative for the next few days. Also there are reports that covid survivors would still be able to pick up and get sick again by the disease as soon as they are released back to society.