Home Plate on Lombard Street in San Francisco has a similar policy, reported SFGate. Signs posted around the restaurant and on the menu asked diners to "Please Drink Responsibly. $50 cleaning fee per person for any incident incur as a result of intoxication."
Other brunch restaurants in the Bay Area use "mimosa fairies," servers devoted to monitoring the intake of guests.
Which type of liberalism is this? 
I dunno, I wanna say critical support. I've worked in catering in long enough and have come home smelling of other folks' drinks and barely covering the rent. But as others have pointed out, this misses both the problems of the system and can unfairly target someone that is just sick or has a disability or something.