The law firm offices that blanket downtown Washington, D.C., will, with a few exceptions for in-firm festivities, go dark on Friday as the city observes the presidential inauguration of Donald Trump.

Road closures will cripple much of the city’s central business district, including beyond the inaugural parade route from the White House to the U.S. Capitol. Even pedestrian access will be limited, both by security perimeters and by the expected crowds.