Nevada will be one of the last states to succumb. Notice you are not hearing anything about any Covid-19 cases there (and I'm sure with the influx of Asian gamblers there have been some). The casino business supports almost the entire state budget! They try to keep any bad news as quiet as possible. Robberies and even murders in and around Vegas/Reno casinos often don't even hit the news. The last thing they want to do is shut down the casinos. And they won't until they are forced to do it!
Just got a press release today from Matchroom saying the U.S. Open will go on as scheduled at the Mandalay Bay casino!
The entire economy there is service to large groups. It is inevitable they will have cases. They are going to take a huge hit and soon.