Lester Louis Adler is an American record and film producer and the co-owner of the Roxy Theatre in West Hollywood, California. Adler has produced and developed a number of high-profile musical artists, including The Grass Roots, Jan & Dean, The Mamas & the Papas, and Carole King. King's album Tapestry, produced by Adler, won the 1972 Grammy Award for Album of the Year and has been called one of the greatest pop albums of all time.

The Roxy Theatre is a nightclub on the Sunset Strip in West Hollywood, California, owned by Lou Adler and his son, Nic.