Anne Hathaway, right, greets honoreer Barbara Cook at the post-show dinner for the Kennedy Center Honors Sunday night. See more Kennedy Center Honors photos. (Margot Schulman for the Kennedy Center)

It wasn’t weird to see Newt Gingrich at the Kennedy Center Honors Sunday night — heck, he’s a regular at the opera and elsewhere in D.C. But it was kind of telling that one of the leading contenders for the GOP nomination sat quietly enjoying the post-show supper in the Grand Foyer: No working the room, no schmoozing, no photo-ops with other celebrities.

“I took one night off to support the arts,” he told us.

“It was date night,” explained his wife, Callista.

Newt and Callista Gingrich arrive at the Honors. (Molly Riley/Reuters)

Maybe too well-behaved. Every memorable party needs a little mischief. Last year, fans mobbed the table around Paul McCartney, ignoring pleas to behave from bodyguards and KenCen staffers.

This year, the room was almost. . . shy. Why? Maybe because the show ran late, and dinner didn’t start until 11 p.m. Out-of-towners seemed to dominate — did no one teach them the Washington table hop? Fewer political heavy hitters showed this year to jack up the excitement — and those who did kept to themselves. (What’s up, Mayor Emanuel? Night off for you, too?)

Meryl Streep is escorted to White House's East Room at Sunday’s reception prior to the tribute show. (Reuters)

Mamie Gummer and Ben Walker (Mike Theiler/Reuters)

Mamie’s new husband, rangy young actor Ben Walker – hey, you’re the one who’s starring in “Abraham Lincoln, Vampire Hunter.” Must be intimidating to play the same role as Daniel Day-Lewis, huh? He laughed. “That one doesn’t have vampires!” It was his first time at the Kennedy Center. Met any interesting political types yet? “Well, the president.” Yes, that counts.

One guy waiting silently for a cell picture with Streep — one of the traditional perks of this particular dinner is the chance to meet the stars — was dressed down by her brother Dana. “She’s had a long day,” he scolded. “You’re kind of stalking her.”

Honoree Sonny Rollins (first row, center) at the post-show dinner for the Kennedy Center 2011 Honors with fellow musicians, clockwise from lower left: Jimmy Heath, Benny Golson, Herbie Hancock, Billy Drummond, Joe Lovano, Ravi Coltrane. (Margot Schulman)

Tracey Ullman and Kelly Ripken – old pals, it seems? Cal’s statuesque wife, a knockout in violet, hugged the comedienne and exclaimed, “You made my night!” Who knew?

Hathaway traipsed carefully through the room, her procession halted by a barrage of fan-girls and a slightly unwieldy long skirt. Fiancé Adam Shulman gathered up the train to help her get over a tricky step. She smiled at him with a sweet little eyeroll. “Thanks, mom,” she joked. One more photo to pose for, and then she muttered to him, “let’s beeline” — over to talk to Sugarland frontwoman Jennifer Nettles.

James Taylor and Yo-Yo Ma catch up at dinner. (Margot Schulman)

The only two guys in the whole room really having fun? Yo-Yo Ma, who sat next to Michelle Obama during the show and spent the entire night with a huge grin on his face. “I was relaxed,” he explained between hugs from friends.”I was lapping up everything. This is huge.”

And Colbert, who attended the Honors for the first time (“I loved it”) , was one of the few stars mobbed all night. “It’s an awards show with no suspense, so that’s nice.”

Read earlier: Kennedy Center Honors: D.C.’s glitziest night of all, 12/4/11

Parties of past years: Kennedy Center Honors after-show party: Guess who’s coming to dinner? (McCartney, Oprah), 12/6/10

After KenCen Honors, the Boss bails on dinner (Springsteen, Mel Brooks), 12/7/09

Kennedy Center Honors after-party (Beyonce, David Gregory, Pete Townsend), 12/8/08