I wouldn’t call this a welfare check on the OP. If they wanted to do a check to make sure the guest was alive and functional, they wouldn’t have waited until the 10pm hour and for the ability to send two guys to the room, more or less demand that the door be opened, and be ready to make a loud stink upon the door being opened. They expected a problem that wasn’t that of an incapacitated guest and were prepared — or perhaps fishing for an excuse — to consider the OP to be a problem so as to escalate the matter.
This incident took place during a booked two-night stay on the first evening after check-in date — that too around three hours after the guest got back into the lobby and used the room key. This was not a welfare check of the OP.
Here’s a review from several hours ago about a security incident at the hotel:
Wie kann es sein, dass jemand Fremdes die Zimmertür von außen öffnen kann, während meine Frau unter der Dusche steht und ich noch am Flughafen bin???
Unsere Karte für das Zimmer hat danach nicht mehr funktioniert. Meine Frau musste in Jeans und Unterwäsche an die Rezeption gehen, weil das Telefon nicht funktioniert.
Es ist sehr schlimm, dass so etwas passieren kann. und das Hotel sagt einfach nur...sorry?!
Ist das ein Scherz?
In short, that fresh Google review from several hours ago for the Radisson Blu Copenhagen indicates that the room of the guy and his wife was entered by a stranger with a new room key while his wife was in the shower. And it mentions the phone in the room didn’t work.
https://www.google.com/travel/hotels...CQoFOgNTRUsaAA
Was that too a welfare check on the guests?