Seems like a decent scenario, though the system is rather scant and therefore largely about just doing RP. At four people, it's a rather limited table size. Not quite as spooky as I would like.
Considering the last hurrah is meant to be a big dinner party, it's a little disappointing that the game is not built to accommodate more people.
The setting isn't my thing, but I can see that a lot of work and thinking was put in, and I could see this being a fascinating way to do an improv play for an audience.