joke about "disappearing" people

An man came tired to a hotel. There were no free rooms, but there was one free bed in a 4-person room, which he got assigned. He tried to sleep, but he couldn't, because of his three obnoxious roommates, who were talking loudly, telling jokes about the party. So he came up with an idea.

He went down to the reception, and ordered four teas, but asked for them to be delivered with a 15min delay. Then he came back, and after 10 minutes he said to his roommates:
"stop talking so loudly, this place is bugged, the KGB is hearing all of this"
"no way!"
"you don't believe me? let me show you"
then he said to a picture on a wall: "Comrade Major, 4 teas for me and my roommates to room 34 please".

A few moments later, the hotel service delivered 4 teas. The roommates were shocked, stopped talking and went to sleep.

Next morning, the man wakes up and sees that his roommates are gone. He goes down to the reception and asks
"where did these other guys go?"
The receptionist answers:
"oh, the KGB was here at 5 AM and took them"
"Why did the leave me tho?"
"Comrade Major liked the tea joke"

https://busshi.moe/@wolf480pl/104771393022979345