Interesting message. We too, have a policy for prepared pianos. If it is to be extreme, we have one older Baldwin SD designated to be brought into the recital hall at their expense (With tuning in the hall and back in it's designated room). Both of our concert Steinways are fairly new and can only be manipulated in minor ways.
We have had no requests! Yay! (I hate prepared pianos!) I'll allow the simple strumming with a pick or gloved fingers, but that's about it on our nice Steinway D's.
As for other than A-440, I have not been asked here, but in Lincoln, at UNL,I was requested A442 a couple of times, one being Chic Corea and Burton on vibes. Of course we did that! The other one was an orchestra from eastern Europe and they agreed to pay for the tunings to get the piano back to A-440.
For practice rooms, I tend to "float" the pitch a bit given our extreme humidity and temperature swings here in SC. I'll let them get up to A441 or 2 in the summers, and A438 or 9 in the drier winters. I've never had a complaint. I like to keep professor studios as close to A440 as I can within 4-5 cents. (like who can tell? Really) Everybody seems happy with all of that.
Anything else needs to be discussed with me and the Dean.
Woah!After reading that I feel like I'm getting away with murder! And I like it!!:}In the several institutions I have worked at, I "float" the pitch- meaning if it's a little sharp, I leave it sharp- knowing it's probably going to move downward.Being that I live in the PNW, the pianos hover around 440.5 +/- to around 441.5 (in the summer months).I tune the piano at it's happy place and the pitch is a secret only me and the piano know. It's never been an issue.If there are two pianos in the room, I will take the average pitch measurement of the two, and tune them to the same pitch.
There are instances where it is requested to be a certain pitch- and when requested, it has ALWAYS been a non-440 request.(usually 441 for the visiting festival comprised of professional orchestra members and one being the principal oboist of the BSO- and believe me- they WILL know if it's not at 441.)O.oSo basically I tune the piano at it's happy place and no one is the wiser.