I just checked a site with allowable words for Scrabble™ and found that XUT isn't. (Darn. After I found this door — on the always-changing art Mecca of 191-197 Toole — I'd added XUT to my secret list of Killer Scrabble Words. :)
(If you know more about XUT, please leave a comment below. You can be anonymous.)
I took the photo back on November 13, 2016.