And observers say the cash-not-card trend is growing, the New York Post reported Monday.
Restaurant consultant Michael Whiteman said cash only is becoming a more acceptable practice.
"You notice it more and more," Whiteman said. "When times get tough, restaurateurs look to cut costs."
One Brooklyn cash-only restaurant owner said about 5 percent of his gross sales had been going to the card companies for transaction fees.
"The fees the card companies charge hurt the smaller venue," the owner said. "But it's a gamble. You are going to annoy some customers."
Some cash-only venues place ATMs -- with their own cash-withdrawal fees for users -- in their establishments so customers can withdraw cash, the Post said. But still, there's an aggravation factor for some customers.
"I've actually gotten up and left places that are cash-only," New Yorker Christine Hanna said.