San Francisco in the 1970s a disaster area. In the same year, with bankruptcy imminent for the San Francisco Ballet, a grassroots effort brought national attention to the association. Prior to the discovery of the first AIDS case in 1981, Dr. Selma Dritz, the city's medical epidemiologist, became alarmed at the increase in sexually transmitted diseases among the city's gay men, opining that epidemics had been triggered after 1974 by "political and social changes in the city". "The Grateful Dead Movie" was filmed in 1974 in San Francisco during the Grateful Dead's October 1974 five performances at the Winterland Ballroom. After the 1974 kidnapping of
Ferries of San Francisco Bay Jack London Square is today, fronting on what is today called the Oakland Estuary, an inlet of San Francisco Bay. The estuary, which in the 1800s included what is today's Lake Merritt, was the "creek". In 1851, Captain Thomas Gray, grandfather of the famous dancer Isadora Duncan, began the first regular ferry service to San Francisco from the East Bay. The first railroad ferries on San Francisco Bay were established by the San Francisco and Oakland Railroad and the San Francisco and Alameda Railroad (SF&A) which were taken over by the Central Pacific Railroad (CPRR) in 1870 to become an