The protesters waved signs and chanted, supporting two competing candidates in the Republican primary: Ron Paul and an individual named Vermin Supreme, who wore a rubber boot on his head and danced while speaking through a megaphone.

Mr. Paul’s supporters also broke into dance occasionally, swaying to a recording of “Ron Paul, Ron Paul’’ that was warbled by a Frank Sinatra impersonator to the tune of “New York, New York.’’ At one point they projected an electronic sign flashing their candidate’s name over the “Newt2012’’ above the office door.