Hawkes Bay is a combination of two great New Zealand cities and is not bad at rugby too, your activities can either be organised in Napier or Hastings.
With a great climate and a very large wine growing area your after the event function is going to have some fantastic wines to try (Don't worry there is plenty of your favorite beers as well)
Hawkes Bay has all you ever need to make your weekend, day or night a trip to remember, there is plenty to do or see so you wont be bored.