It is a matter of politeness that you never enter any of the local huts - including the large assembly-huts - unless you are invited by a local ! Please take off your hat, scarf or cap as well and your shoes before you take a seat on the floor like the locals do !
The local people are quite friendly, BUT be aware: in this area man-eating and cannibalism still happens now and then...
This is something special that happened to me or rather my trousers after intensive hikes on this island: Take a look at my picture, there were hundreds of sticky plants or rather seeds of plants that took me a lot of work to clean them from my pants.
It is SUCH and similar plants that you should not take to any other island when taking a cruise in that area, and especially when your cruise gets back to Australia you might get into trouble, when the customs-authorities find such things attached to any of your trousers or shoes etc.
Bula or Bula, Bula is the local word for "Hello" ! And so you will hear these words quite often, when you take a walk on any of the Fiji Islands. Bula is the local word for "hello, how are you?" and a lot of people will great tourists as well that way in the streets.
It is always ment in a friendly way, and almost never it is just a way to get into contact with a potential customer. When-ever you go inside a shop and just take a look around without buying anything they still stay nice and friendly and I also found lots of local people who like to chat with tourists !