The first two have been done to death on this board, so I'm guessing it's #3.
I don't think that's the same thing. Looks like a typical Vietnamese meal to me.
Yeah, that's a typical Vietnamese hotel. Ninh Binh is a couple hours south of Hanoi by car or rail. They do eat dog there but not in the hotels.
And while the Vietnamese elite do often go in for black magick rituals, cannibalism is something that hasn't been common there since the Middle Ages. If a secret society were eating human flesh, they wouldn't be doing it out in the open in a hotel like the Vissai.