At Karen’s Diner bad manners are on the menu and smart-mouth waiters turn the tables on customers.

Their first store opened last year in Sydney to wide success and their staff went viral online, for their unpleasant and cheeky service.

But now the Aussie restaurant chain is taking over the world.

At Karen’s Diner bad manners are on the menu. (A Current Affair)

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What’s behind the name?

A Karen, by definition, is a woman who is perceived as entitled, obnoxious, and demanding in a public setting.

We’ve seen many examples of Karens over the past couple of years, but this restaurant is grabbing them by the horns and opening dozens of restaurants in the name of Karen.

One waitress lets rip at the customers. (A Current Affair)

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A Current Affair paid a visit to the newly opened Karen’s Diner in Melbourne and as expected, received quite the rude welcome.

For reporter Sam Cucchiara, waitress Kali was one of the tougher interviewes in his career.

Cucchiara put some questions to Kali, which included asking if she had always had a potty mouth.

A Current Affair reporter Sam Cucchiara spoke to waitress Kali. (A Current Affair)

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“Yes. Next question,” she quipped.

Kali said they often have people coming into the diner who have no idea what Karen’s Diner is, but she said she quickly puts them in their place.

“I tell them to do their f—— homework,” she said.

“As for parents with young kids, “They f—— love it.”

While the service may be terrible, the food isn’t half bad.

Diners told A Current Affair they were quite impressed with the quality of the food.

With Karen’s 60s American diner theme – burgers, fries and chicken wings are on the menu. (A Current Affair)

With Karen’s 60s American diner theme burgers, fries and chicken wings are on the menu.

You may be thinking: “Poor Karens of the world”, but in the case of Karen’s Diner, anyone named Karen is treated like royalty, with Karens offered a free drink if they can prove their title.

Karen’s Diner is now set to open a multitude of Karen’s Diner venues around the world, including New York and London.

The Aussie franchise has grand plans to launch 11 diners in the USA this year, as well as opening stores in Brisbane and the Gold Coast in just a few weeks’ time.

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