A bar displays its dress code.
dress code definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a standard of dress established for a given environment, as in the military, in a school or business, or in a cultural group
dress code definition by American Heritage Dictionary
A set of rules, as in a school, indicating the approved manner of dress: “the company's white-shirt black-tie dress code” (David Pauly).