Gamestation in Morecambe have a deal on Gamecube Donkey Konga, musical game including the drum controller. They're in the 2 for £20 offer and there's 2 versions of the game. Another £5 for a gamecube and and you've got 2 drum controllers and 2 "games".
Open the top of your Wii, plug in the drums, pop the mini-cd into the middle of the drive and away you go. Kids are playing it now, hilarious. It'll be even funnier after a few pints