After the virus has been defeated, I won't go to casino immediately, I will take some time, cause Im not a gambling addict. So, I've decided that I will go for a short tour after the quarantine period, cause really, Im very tired for this quarantine. 
I think casinos will do it by default. Enough time will be spent closed to explicitly exclude the possibility of infection of the premises.
Although it is impossible to say unequivocally that all casinos will do this, because every day of isolation they lose profit.