Finland is indeed the best place on earth to live if you just want to be left alone. Also: saunas.

As for the cultural differences regarding the ritual of leaving a social event, I really enjoy hearing about how things happen in other places. I would have had no idea.

That said, I get the sense that the author is either in Canada (.ca domain) or California, where people leave parties without ceremony all of the time. It would actually be far stranger to make a big deal of your departure.