WASHINGTON — After leaving the Commander-in-Chief’s Ball Monday evening, where the newly re-inaugurated President Obama thanked the troops and the first couple danced to Jennifer Hudson singing Al Green’s “Let’s Stay Together,” the Obamas headed to this Inauguration’s only other official gala, the Inaugural Ball, also being held at the Walter E. Washington Convention Center.

At the Inaugural Ball, the Obamas again danced to Jennifer Hudson singing Al Green’s “Let’s Stay Together” — twice more.

Scheduled performers included Alicia Keys, Black Violin, Brad Paisley, Far East Movement, FUN., members of the “Glee” cast, John Legend, Katy Perry, Maná, Smokey Robinson, Soundgarden, Stevie Wonder and Usher.

Organizers converted the convention center’s massive, bare-bones exhibit hall into a slightly less bare-bones ballroom. No chandeliers here — just a few drapes and decorations to spruce up the exposed ceiling and fluorescent lights. Revelers danced on the center’s industrial concrete floor.

The Inaugural Ball was split between two floors in the building, and attendees were not allowed to go from floor to floor.