The first rule of Fight Club is : you do not talk about Fight Club . The second rule of Fight Club is : you do not talk about Fight Club . Third rule of Fight Club : someone shout " ! Stop ," fail, signal , the fight is over. Fourth rule: only two guys in a fight. Fifth rule: one fight at a time , folks. Sixth rule: no shirts, no shoes . Seventh rule: fights last as long as necessary . And the eighth and final rule: if this is your first night at Fight Club , you have to fight .