dude, 10 hours? The last time had a lan party it was about 36 hours.
It was awesome, though I think that 24h is enough, coz u start to run out of good games if u play too long.
But yeah, they are nice once in a while. We have 1 bigger one every year (though that ain't too big, something like 20 guys) and then we sometimes have this "invites only" lan party, where me and my friend just ask our friends to come to. In the bigger one someone always know someone else since most of us are from the same small town. But last time there were 2 guys I have never seen before.