Thomas Foo
I was walking around Sydney towards the Opera House when I stumbled across these guys, and decided to give it a go. Really happy that I did! $85 for 30 minutes but if you the spare cash, definitely worth a go, especially as I probably wouldn't come back to Sydney anytime soon.
You go up and down the river, under the Sydney Harbour Bridge and check out all the sites, whilst also getting splashed and wet, tossing and turning in the boat, with music pumping. The skipper was also pretty cool.