locate one of the unused spaces that are unlikely to
be redone anytime soon. Check the electrical and net connections schedule a lot of meetings so you can scurry(I can picture you scurrying, practice) to the new digs and do your work without annoyance. If questioned insist that you have had that space since when you needed seclusion to preform a mystic event in your companies far past (that cant be proven or documented).
Any opinions expressed by me are mine alone, posted from my home computer, on my own time as a free American and do not reflect the opinions of any person or company that I have had professional relations with in the past 55 years. meep