What's the first rule of girls fight club? Only women allowed. An homage to David Fincher’s classic dystopian film, this time with lesbians. What's the first rule of girls fight club? Only women allowed. An homage to David Fincher’s classic dystopian mind-fuck of a film. Rough and delicious lesbian sex, a killer soundtrack and enough energy to get you pumped up for the rest of the week, this is not one to miss. Starring Viktoria Vaar and Silvia Rubi.