Hank sez, "The San Francisco Examiner reported in March 1937 that private investigator Edwin Atherton, hired by the city to investigate police graft, delivered a list of 135 long-term brothels, called 'resorts,' to the Grand Jury investigation police corruption, finding bordellos in neighborhoods from South of Market to North Beach."
San Francisco Examiner lists 135 long-established house of prostitution
(Thanks, Hank!)