Kevin Falk : Men Magazine

Subculture : Gay Biker

Gay male leather culture has existed since the late 1940s, when it likely grew out of post-WWII biker culture. Early gay leather bars were subcultural versions of the motorcycle club. Pioneering gay motorcycle clubs included the Satyrs, established in Los Angeles in 1954; Oedipus, also established in Los Angeles in 1958, and the New York Motorbike Club. Early San Francisco clubs included the Warlocks and the California Motor.
Ref : Wiki