I had a similar -- but not nearly as traumatic -- experience in Brussels about 15 years ago, junior year of college. I had been there for a few days with my best friend and two Australians we met on the bus from the airport, but they had all left the day before.
My only roomie that last night was a Lebanese man who called himself the Angel of Brussels and said God told him I would be the next King of Ireland.
With that, I essentially had the whole floor of the hostel to myself.
After my shower, I came back to the room and swiped my card. Red light.
Swiped. Red light.
Wiped it on my towel. 🚨Red light🚨
SWIPE🚨 SWIPE🚨 SWIPE🚨
In the middle of winter.
I stood, naked but for my towel, staring at the key reader, willing it to let me in, but I knew what I had to do.
I took a deep breath and flung the door open, shocking a little old lady who happened to be passing by
I am so happy, now, that smart phones were still years away at this point.