Denis Leary & Crew Party It Up!

"TRUTH or Dare?" Madonna's got nothing on the cast and crew of "Rescue Me," the New York-set F/X channel firefighter dramedy starring Denis Leary.

Late last Tuesday night, following the show's Christmas party at the SoHo Grand Hotel, a band of merrymakers led by Leary swarmed the downstairs bar of Ono at the Hotel Gansevoort and immediately decided to play Truth or Dare with shots of vodka as truth serum.

But the actors — including Leary, hunky co-firefighter Daniel Sunjata and fetching fire vixen Callie Thorne — preferred "dare" and instantly turned the game into a flagrant exhibitionism session.

"They ordered every kind of vodka the bar had," says our reliable spywitness, "which included 15 brands. They put it on a Lazy Susan, spun it around and played the game. They were calling it the Boozy Susan.

"There were no make-out sessions." Instead, the "Rescue Me' revelers were merely "baring their breasts or their [male private parts] — or they'd moon someone. It went on for an hour and a half. Callie lifted her shirt and put her breasts on the bar.

"Denis slid down a banister completely naked. He did it lickety split," continues our tattletale. "Where they were sitting was facing the hotel's courtyard on Ninth Avenue. They were flashing the incoming traffic. Everyone was blowing their horns at them.

"It was a lot of fun — completely debauched. The wait staff was laughing their a - - es off. They knew they were going to get an enormous tip."

Our source also reports that Leary and members of the show's writing staff did "naked Irish jigs," causing the hotel's kitchen staff to "cower in a corner."

(pagesix)