Answer by  
                                                                                          LeheckaG (1826)
                                                            
                          
                          
                                                          "Hens-night" is a United-Kingdom (and former-United Kingdom, like Australia) term;
 it has the same meaning as "Bachlorette-party" in the United-States, "stagette" in Canada,
 a dinner-party for a woman who is about to get married.
 
 "Hens-night-games" refers to the "adult" party-games which women play at such a bachlorette-party.
 
 The male-version is a bachelor, buck, bull, or stag party.