WASHINGTON — "At Last" may have been just what President Obama and his wife were thinking last night as they glided through their first inaugural dance to the Etta James classic.

The Obamas were the star attraction at the Neighborhood Ball, the first of 10 inaugural celebrations they planned to attend, going into the early hours of today. The celebrations marked the end of a long day of formal inaugural events and the two-year campaign that put them in the White House.

The president pulled his wife close and they danced a slow, dignified two-step while, offstage, Beyonce sang. The president spun first lady Michelle Obama once in a half-turn.

Obama cut loose in a faster groove a few minutes later, as Shakira, Mary J. Blige, Faith Hill and Mariah Carey sang along with Stevie Wonder to his "Signed, Sealed, Delivered." The song was played at nearly all of Obama's rallies throughout the campaign.

"You could tell that's a black president from the way he was moving," comedian Jamie Foxx joked following the dance.

The president wore a white tie, while Michelle shimmered in a white, one-shouldered, floor-length gown. It was embellished from top to bottom with white floral details and made by 26-year-old New York designer Jason Wu.

"First of all, how good looking is my wife?" Obama asked the crowd.

"I hope all of you will remember what this campaign and hopefully this presidency is all about," Obama said. "It's about you, pitching in, working together, trying to get past our differences in order to create the kind of world we want to pass on to our children and America."

At the Commander in Chief Ball, Vice President Joe Biden saluted the nation's military men and women and then said he wasn't looking forward to his moment in the spotlight — the dancing, that is.

"The thing that frightens me the most (is) I'm going to have to stand in that circle and dance in a minute." At that, he laughed and did a quick sign of the cross.

Despite the formal attire and celebrity entertainment, balls aren't overly fancy affairs. Lines often are long to get in, go to the bathroom or check your coat, and the food is heavy on vegetables with dip and cheese cubes.

In a sign of the tough economic times, guests who already paid anywhere from $75 for a ticket to thousands more for a package deal had to buy their own drinks served in small plastic cups. Beer went for $6, cocktails for $9 and champagne for $12.

People waited in line more than an hour at Union Station to get into the Eastern States Ball. Because of very limited seating at the Western ball, a number of attendees in long gowns and fancy dress plopped cross-legged on the floor.

"This is what happens in a down economy. No chairs, no highboys — it's the floor and plastic cups," said ballgoer Brig Lawson, 38, of Las Vegas.