They can also be organized by ''Wanted to Invite'', ''Had to Invite'', and ''Didn't Invite, But Showed Up Anyway''.

What's the one thing that we can deduce from this Venn diagram? If you're hosting the party then you'll be related to all the obnoxious people because a smart host/ess wouldn't invite obnoxious people they weren't related to. Those that are invited fall into the ''Had to Invite'' category on the other diagram, which has obnoxiously been left as an exercise to the reader.