Kiwis extend their hospitality by sharing food. It is considered a good manner when you show up with food or wine when you are invited to any kind of gathering in New Zealand.
People of New Zealand might seem extroverted at first but they like to keep certain things personal. Avoid talking about kids, personal income and stuff like that.
The legal age of drinking in New Zealand is 18 and if someone doesn't drink alcohol, it is acceptable to have non-alcoholic drinks. However, smoking is less common in public.
It is common for the kiwis to socialise at work and share morning and evening teas. They frequently celebrate birthdays, events and go out of Fridasy as well.