This is the only way I can watch them. I don't want to waste several days watching a film a night. Give me the whole epic from start to finish in one sitting! My ADHD hyperfocus will help me power through it, as long as I have enough drinks and food prepared.
Add in The Hobbit: The Tolkien Edit at the beginning and you have a pretty full day. The Tolkien Edit is a fan edit that removes all the fluff that's not in the books and combines the Hobbit trilogy into one 4-hr film.
Woah, they made a Hobbit movie! I hope they kept it to one movie, because there's really not enough content to stretch to three and it'd turn out horribly. As long as they aren't really dumb there's no way it could possible be bad.
We do exactly this. Marathon day around Christmas time - bonus points because you have more free time for a movie day and there is plenty of food already!
This is how I saw part 3 in the cinema at opening. The cinema had part 1 and 2 extended on the day leading into launch and just after midnight we watched part 3.
I recently watched the entire extended trilogy in one day at the cinema. There were only two pauses. One 15 minutes long after the first movie and one 30 minutes long after the second movie in time for dinner.