Here's the thing about a haunted hotel: when something goes wrong there's no fixing it. Because there's nothing wrong with the wiring or electric right now. The hotel or the ghosts or whatever just don't want it to work.
Anyway, if you're having a hard time, I'm setting up the ballroom into a place where I'll have a generator and lights rigged up with my own power source. Charge your phones, have something to drink and someone else do some cooking so I don't burn the place down trying too hard.