Ah, community living. As disclosed in a previous post,
my shared hallway bathroom
has hot water at the sink
and cold water, only, in the shower (no tub).

Around the corner and down another hallway in the same wing,
is another shared bathroom.
Thus, I finally have clean damp hair because I ventured to
a different communal bathroom than the one designated for my room.

Furthermore, the question from the nursing care coordinator:
Why didn't XYZ across the hall from you,
whose room is the other designated room to share that one bathroom,
complain about the lack of hot water in the shower before you did?
"Well," I said,
"maybe he knew the shower had no warm water and so
he just went and showered in that other bathroom around the corner
and didn't say anything to anybody about it..."

... it's called examined living. Literally: Examined Living.
Anyway, the care coordinators were formally informed by me that
this bathroom has no hot water in the shower, and
an order has now been filled out and submitted. Sigh.