• Politeness It's common courtesy to greet nearby staff when entering or leaving a shop, cafe or restaurant.
  • Greetings Shake hands with men and women when meeting for the first time and when saying goodbye. Female friends are greeted with a single (air) kiss.
  • Taboo Topics Although Donald Trump is almost universally reviled in NYC, politics and religion are topics best avoided.
  • Transport Allow passengers to exit the subway car before entering; don't block the doors.
  • Gratuity Not optional in restaurants or bars; don't forget to tip.