Pres nite karaokenannigans

G'day fellas.
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After discussion with Rose and Jess, looks like there is room in the pres nite budget for a karaoke machine. So we've booked one. It'll be delivered direct to the Redback on Sat morning.
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By the end of the night I have no doubt it will have its own momentum, but to get things rolling when everyone's still relatively sober, it might be an idea to have one or more games/challenges.
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An idea that springs to mind is: give each table/team a song and give them 15 minutes to change the words to be about volleyball or Renegades then perform it for everyone.
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Any other ideas?
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Incidentally, the thing doubles as a 3000-song jukebox. So we don't have to organise our own music unless we want to. Anyone who wants to however is of course welcome to.
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Cheers
Jesse