This guy had a night to remember on the Lower East Side.

A man called 911 around 7:35 a.m. Friday because he was locked inside the Marshall Stack Bar on Rivington Street near Allen Street, the FDNY said.

Firefighters responded moments later, opened the door and let the man out.

The man, who appeared to be in his 20s, was locked inside the bar since it closed at 4 a.m.

Mike Dalton, 51, who lives above the bar, called the man’s gin-joint sleepover “fairly surprising.”

“This is a fairly low-key bar,” Dalton said. “I’ve lived in the building for 20 years, and it’s mostly locals. This is the kind of thing you’d see from some of the bars down the street, but not here. I can’t imagine where he must have been hiding that they missed him.”

An employee of a barbershop next door laughed when he heard what had happened.

“That’s crazy,” he said. “I mean … it is Friday the 13th.”