In any event it is very unlikely that the authorities will actually get around to checking every person's overnight accommodation address but some (probably newspaper) crank will no doubt put down The White House, 1600 Pennsylvania Avenue NW
, Washington, DC 20500 and get away with it.
Your trip will likely include a visit to see 1600 Pennsylvania Avenue NW
, home of the city's most famous resident (Metro: Metro Center on the blue, orange, and red lines or Federal Triangle on blue and orange lines), with its Rose Garden and dozens of trees planted by presidents.
Some important addresses: Environmental Protection Agency, 401 M Street SW, Washington, DC 20460; Vice-President Al Gore, 1600 Pennsylvania Avenue NW
, Washington, DC 20500; Honorable___, House of Representatives, Washington, DC 20515; Senator___, United States Senate, Washington, DC 20510.