The song Amia and Jane are playing is composed by the famous Hungarian composer Béla Bartók , and it's called "Este a székelyeknél" ("Evening in the village"). The tune comes from a folksong, which is called the "ancient Székely anthem". The székelys are a Hungarian ethnic group, who live in Transylvania, or Székelyföld ("Székely's land") as they call it. Thanks to his Hungarian paternal grandfather, Louis C.K. shares his last name (Szekely) with this ethnic group.