Well, the laugh is on me, this time.
I am in my bedroom here; I let myself into the room using my room key on its keyring with the little plastic room-number tag.
So I have not locked myself OUT of my room,
as I am in my room, however:
I can't find the key.
I'm taking the room apart, I know the key is here SOMEWHERE,
but can I find the key? NOWHERE.
Emptied and shook out all the tote bags, handbags, luggage, pockets of everything ...
the only thing left to do is to strip the linens off the mattress, and inspect the stripped bed and the sheets, spread, blanket, pillows and pillowcases ...

I just picked up the room phone, and reported to the nurses' station
that I'm in my room and I can't find my room key.
Do I ever feel STOOPID.