"Are you there Moriarty?" is an excellent party game, preferably after plenty of beer. For those who havent experienced its delights, here is how you play it.
Two people are blindfolded, and lie face down on the floor with their heads towards each other.They extend their left hands and clasp each other. In their right hands they hold a rolled up newspaer. Player A says"Are you there Moriarty?". Player B says "Yes", and simultaneously moves his head(or, as the case may be, doesnt move his head). Because Player A, as soon as he hears the "Yes" attempts to hit Player B on the head with the newspaper. This continues alternately for a while, with spectators shouting encouragemnt, and then two more become the players.
   Presumably the game acquired its title from the song. Possibly it existed before the song with another name? Anyway, it is strongly recommended.