By the 1930s, approximately 650 Koreans resided in Los Angeles. They established churches, restaurants, and community organizations, as well as businesses that primarily focused on vegetable and fruit distribution. In 1936, the Korean National Association, one of the largest Korean immigrant political organizations, moved its central headquarters from San Francisco to Los Angeles to continue promoting political, cultural, educational, and religious activities. However, racial covenant laws and economic constraints limited Korean residents to an area bounded by Adams Boulevard to the north, Slauson Avenue to the south, Western Avenue to the west, and Vermont Avenue to the east. The 1930s also saw the height of the area's association with Hollywood. The Ambassador Hotel hosted the Academy Awards ceremony in 1930, 1931, 1932, and 1934. As the entertainment industry grew in the surrounding Koreatown area, Koreans remained segregated into low-income districts because of discriminatory housing policies. After the 1948 Shelley v. Kraemer Supreme Court case prohibited racially restrictive housing policies, Koreans began to move north of Olympic Boulevard to establish new homes and businesses.