The Last Night of the Barbary Coast (1913) was an early example of the exploitation film, showing what was purported to be the last night of the Barbary Coast red-light section of San Francisco.
In reality, the Barbary Coast wasn't shut down until 1917.
The film, directed by Hal Mohr and Sol Lesser, is now considered a lost film.
[1] Mohr (a native of San Francisco himself), later an Academy Award winner, did the cinematography, and Lesser went on to become a Hollywood producer.
This article about a short silent documentary film is a stub.