This 1975 clip shows Hells Angels bikers riding through San Francisco and, eventually, congregating outside the federal courthouse at 450 Golden Gate Avenue, near Polk Street. The courthouse is also known as the United States District Court of Northern California. 

The clip begins with a queue of bikers heading toward the camera. 

Hells Angels members stand in the courtyard area before the courthouse; a number of members are drinking Budweiser, identified by red and white aluminum cans. 

Members park their motorcycles. Dozens of motorcycles are parked along a curb. 

Several Hells Angels members stand alone. Others stand with their girlfriends or spouses. There are close-ups of some male members; some look worried, concerned, and/or distrustful. 

A San Francisco Police officer rides by on his motorbike, eyeing the camera.