In certain embodiments, social distancing is implemented at a gaming establishment (such as a casino) by disabling one or more neighboring gaming machines from being played while a first patron is playing at a first gaming machine. Social grouping is implemented by enabling a second patron who is in a social group with the first patron to play at one of the neighboring gaming machines, while the first patron is playing at the first gaming machine. In some implementations, a gaming system of the gaming establishment controls which gaming machines are disabled. In other implementations, patrons' cell phones running a gaming app communicate directly with the gaming machines to disable the neighboring gaming machines while enabling patrons in the same social group to play at neighboring gaming machines. In some implementations, play at a gaming machine is prevented by temporarily disabling the gaming machine's bill validator.