A Philadelphia man is suing a New York City cocktail lounge over allegations the bartenders refused to serve him because he was wearing a "Make America Great Again" hat, the New York Post reported.

Accountant Greg Piatek said he was visiting "The Happiest Hour" near Greenwich Village after a tour of the 9/11 Memorial with some friends, when he took a seat at the bar wearing President Donald Trump's signature campaign hat.

The first bartender served him a beverage, but when he called for a second he was ignored, Piatek, 30, said.

One of Piatek's friends got a bartender's attention and asked that he be served, only to be asked whether the man's hat was "a joke."

Chicago Music Shop Owners Forced to Shut Down Over Trump Support

'The Last Time I Saw a 'Fail' That Bad...': Gutfeld Rips Maddow's Trump Tax Reveal

Jeffress: Texas School's Prayer Room OK If There's 'Equal Access'

"I can't believe you would support someone so terrible and you must be terrible as a person," another bartender yelled at him.

"Don't even try to order from me," Piatek said she told him.

The bar's owner reportedly told Piatek that "anyone who supports Trump... is not welcome here, and you need to leave right now because we won't serve you."

Piatek's lawyer, who is bringing the case before the Manhattan Supreme Court, said the Pennsylvanian was "humiliated" by the incident.

Piatek said he thinks he was served the first drink only because the hat's slogan was not facing the bar staff.

The Post reported that bar owner Jon Neidich did not respond to calls. A manager at the bar refused to comment.

Tim Allen Calls Out Hollywood Liberals: 'This is Like 30s Germany'

Trump: Obama's Been Nice Personally, But There's 'Animosity' From His People

Pirro: The Intolerant Left is 'Changing the Rules' on Law and Ethics