Casino operator Caesars Entertainment has rolled out a new policy that links comped drinks to how much a customer spends on gambling.

On Wednesday, Las Vegas media outlet KTNV reported that Caesars had rolled out a new comp drink monitoring system at all its Nevada properties. The automated system, which was field tested this summer, means gamblers will now have to spend big to drink for free.

The new setup involves a lighting system connected to the backs of video poker machines (customers can’t see them, but bartenders can). The light is blue to start, but the light switches to green if a customer wagers a certain volume over a certain period of time. Failure to sustain this wagering level means the light switches to red.

The new system means Caesars’ wait staff and bartenders have little discretion in terms of deciding who gets free drinks, with the exception of Seven Stars and Diamond tier loyalty club members. For everyone else, from this point forward it’s green light go, red light no.