Park MGM just opened on September 30th, 2020. Upon ReOpening Park MGM has become a SMOKE FREE Casino. Several of the casinos were considering making the casinos smoke free. They did a study to see if people would come to Vegas if the Casinos were smoke free. The numbers did not pan out, so most casinos remain smoker friendly.
Park MGM will be the experiment casino. Second hand smoke is so bad for the employees of the casinos and other patrons. The casinos are starting to make Smoke Free rooms for those who want to avoid the smoke. It is.a tough battle, because smoke is bad for people around. But on the other hand Vegas is one of the only places left where smokers can enjoy a cigarette and a drink and gamble at the same time.
It will be interesting to see how Park MGM does as a smoke free casino. If they do well, some other casinos might follow suit.