Ask o_O, he's a pro at those things. He's DJed at decetly sized ones i think :p
Only at house parties! :p
YouTube - Deadmau5 - I Remember (Vocal Mix) (http://www.youtube.com/watch?v=SBathERR6l0)
idk if you qualify it as techno but deadmau5 is certainly a welcome addition to any rave.
deadmau5 has a magical understanding of how to make a song appealing... I Remember is an awesome song. There's a killer <a href="http://www.youtube.com/watch?v=zK1mLIeXwsQ">drum and bass remix by Kaskade</a>. My favourite song by him is <a href="http://www.youtube.com/watch?v=tKi9Z-f6qX4&feature=fvst">Strobe</a>, off of his new album. Also worth checking out are <a href="http://www.youtube.com/watch?v=YnEUfeiSKt0">Faxing Berlin</a> and a couple of remixes of that, <a href="http://www.youtube.com/watch?v=XlwGwHm_TUI">Watching Berlin</a> and <a href="http://www.youtube.com/watch?v=shBKTA3QIok">Longest Road</a>.
I think you should check out these songs too:
<a href="http://www.youtube.com/watch?v=LwF0eEPvKu8">Cara Dillon vs. 2devine - Black is the Colour</a>
<a href="http://www.youtube.com/watch?v=I5vQ815iFao">Thomas Hart - Beached Whale</a>
<a href="http://www.youtube.com/watch?v=xv4ZxTyRKqc">John O'Callaghan feat. Audrey Gallagher - Big Sky</a>
<a href="http://www.youtube.com/watch?v=t2lav8rqK4Y">John O'Callaghan feat. Sarah Howells - Find Yourself</a>
But really, the best advice I can give you is to get a hold of a Ministry of Sound anthems album. I think there are three out now, and they're full of dance songs that most people will know, so they're good for parties. Also, electro/house is the best genre for a party; I've found that a lot of people are alienated by trance and other styles of dance music. Maybe 'cos they don't like it, maybe 'cos they don't know it, I dunno. But everyone seems to like electro, even if they haven't heard it before though. :p