Park Police also arrived in force on Saturday morning, in anticipation of the dance-off.  Sherwood said most of the law enforcement was keeping a low profile, except for one officer, who stood watch carrying an assault rifle.

The dance party drew hundreds of spectators and dozens of dancers.

Police asked the gathered crowd to clear the rotunda shortly after 12 p.m, but around 20 remained, including a man wearing an oversized Thomas Jefferson head.  Those who stayed inside the memorial boogied in front of Thomas Jefferson’s statue, as the crowd chanted "TJ, TJ."

Authorities gave the stragglers three warnings to leave the rotunda.  They reported that after the final request to leave, all of the dancers had cleared the interior of the memorial.