Sister Double Happiness was an alternative blues rock band that existed from 1986 until 1995, formed in San Francisco, CA, United States. Its core members were Gary Floyd and Lynn Perko, who were in the seminal punk rock band The Dicks and Ben Cohen of the Pop-o-Pies. 　　Sister Double Happiness recorded and released four LPs, one EP, and one live record in its nine-year existence. After they disbanded, Floyd went on to front Black Kali Ma and recorded solo material. Perko later joined Imperial Teen. 　　After the dissolution of Sister Double Happiness, Floyd formed and primarily played in Europe with the blues group The Gary Floyd Band; an overview of this material, Backdoor Preacher Man, is available in the United States.