The Hong Kong Jockey Club (an evening)
I have never been into horse racing, so when I got this tip I was sceptical - but it turned out to be awesome!
Apart from horse racing there are stands with local food, music, beers, and a great party atmosphere.
When I was there this evening occurs only once a week so check when it happens and don't miss it!
Practically every backpacker has either heard of it or been in it, Wanaka's Cinema Paradiso is a great opportunity to catch up with some of the recent blockbuster that went out while you were away in the mountains. The cinema itself is not the ordinary multiplex you're used to from home, and all viewers sit in some sort of a unique sit/chair/??? inside a room that kind of feels like somebody's giant, vintage living room. I could elaborate a little more and even post a link to some pictures that better explain what am I talking about, but I think it's best for you to just come and see for yourself. It's better to come a little bit early so you can get tickets and reserve yourself a 'special' sit. Don't skip on the giant chocolate chip cookies that are being served during the intermission!