I aslways come a little earlier on ofisial ivents, but at party I prefur coming later. I think its confusing to come as a first guest and just sit and wondering what to do, becouse no one comes to party in time )) or its people who wants to help with organisation ....
That's why being late doesn't mean you were late, like coming to a party. Some peeps like to come later unless they are they organizers.