Keith "Lucky" Lehrer is a drummer from Los Angeles, California associated with several influential LA punk rock bands. He was originally trained in jazz then played in a number of LA punk rock bands, particularly the Circle Jerks, Redd Kross, Bad Religion, Darby Crash Band and LA's Wasted Youth, among others. Lehrer also appeared in three notable documentary films charting the punk rock music scene. He is the brother of LA's Wasted Youth guitarist Chett Lehrer. Lehrer also teaches drums, with notable students being future Bad Religion drummers Pete Finestone and Bobby Schayer. He was an early developer of hardcore punk drumming and he has been called the "Godfather of hardcore drumming". Lehrer was voted the best punk drummer of all-time by fanzine Flipside.

The Decline of Western Civilization is a 1981 American documentary filmed through 1979 and 1980. The movie is about the Los Angeles punk rock scene and was directed by Penelope Spheeris. In 1981, the LAPD Chief of Police Daryl Gates wrote a letter demanding the film not be shown again in the city.