Ballroom's open, it's the fucking penthouse you can only sometimes get into.

[he refuses to say panthouse.]

I see where you're going, but good luck with two things: getting a demon who's out to kill you near it, and setting up a whole ritual with a demon out to kill you.

Not to mention that you'd need to have the necessary components, and we can't just hand those off to someone on the off-chance they're going to be the target.