Or to advertise to get large chested women to serve beer! Its just a preference. If they are making an unprofitable preference, the best punishment you can do

Or to advertise to get large chested women to serve beer! Its just a preference. If they are making an unprofitable preference, the best punishment you can do is let them continue their policy and let other competition pick up where they leave money on the table. If the decision they are making is profitable, no amount of law will help against the desires of people.