An un-named Miami-area bar tried to make light of the hostile anti-gay atmosphere in the 1950s by posting the following set of sarcastic rules for its patrons to follow. They were published in One Magazine in 1955.
First of all-remember that the customer is never right.
Source: bostonspiritmagazine.com
Before drinking, each customer is to repeat six times “The customer is never right.”
Source: nyinexile.com
When a customer wishes to go to the restroom–please raise hand and barmaid will direct you to proper door.
Source: jonnodotcom.tumblr.com