NEW YORK (CBSNewYork) – It’s not Halloween yet, but Mayor Bill de Blasio opened the doors to Gracie Mansion, helping New Yorkers get into the spirit of being spooked.

On Tuesday night, the de Blasio family opened their home to the public, turning it into a haunted house for one night.

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“It’s the first time I heard of a mayor hosting a Halloween party,” guest Carol Archer told CBS 2’s Weijia Jiang.

Inside and out, the grounds were covered with makeshift tombstones and grim reapers.

“It was very scary,” one child said.

Visitors had a rare chance to tour the first floor, filled with performers in costume and sweet snacks.

The mayor and the First Lady dressed up as a god — always a politician.

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“It’s kind of Zeus-like, but we’re not going to affiliate it with a specific god,” de Blasio said.

Organizers said they had to close registration after a few episodes because so many people signed up for a tour.

In all, about 500 children, including 100 from area shelters, were a part of the event.

“It was really big. There were a lot of costumes and candy,” Gracie Mansion guest Chase Ellison said.

The night proved to be a real treat for New Yorkers.

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