Thank God It's Friday (1978) Starring Donna Summer, Ray Vitte, Jeff Goldblum, Valerie Landsburg, Terri Nunn, Chick Vennera, Mark Lonow, Andrea Howard, Otis Day, The Commodores, John Friedrich, Debra Winger On a Friday night at Los Angeles discotheque the Zoo, everyone's got his own agenda. Blue-collar type Gus (Chuck Sacci) is meeting a blind date. Underage girls Jeannie (Terri Nunn) and Frannie (Valerie Landsburg) sneak in, hoping to win a dance contest. Lecherous club owner Tony Di Marco (Jeff