In the United States, ladies nights are popular promotion at bars and nightclubs, offering free admission and other incentives for women to show up. Any money the establishments lose on their female customers are offset by the increase in male patrons.

TRIVIA:

 

In the '90s, this was used in commercials for Bud Light beer, where 4 guys dress up as women to take advantage of a ladies night promotion at a bar.

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