Try to keep it all the year
Try to keep it all the year is a story written by Hyakunichisou 13. It originally ran in Issue 64 at http://s2b2.livejournal.com/347786.html, and is mirrored at http://www.shousetsubangbang.com/mirror/try-to-keep-it-all-the-year/.
The restaurant is the former Euclid Hall, also known as the Massey Mansion or the Keg Mansion: https://en.wikipedia.org/wiki/Keg_Mansion. It is indeed reported to be haunted.
The movies referenced are "A Christmas Carol" and "It's a Wonderful Life."
Stories featuring the same characters are (in order of occurrence):
- Everyone goes through the door
- The shadow in the classroom
- Logging in old Algonquin
- Six warm nights at the end of October
- Try to keep it all the year
- Always will I ever