The number of allowed people is surely implemented but I don't think to have the tests result as a requirement will be imposed. Not all people are encouraged to undergo the Swab test unless they feel the symptoms, to save supplies and cost. And for the cost, people are the ones paying for it so I doubt they will undergo that just for the purpose to play on casinos.

I'm with that idea honestly to ensure every gambler is cleared from the virus. However, that kind of requirement might discourage gamblers to play there since it's too much for a hassle especially on a healthy person. But hopefully, it will be considered for the sake of all people there, not just for gamblers, but for casino staff as well.