Thx very much for the effort, it's not this one. I'll look into it.
I finally found out after 1 good hour of searching. I didn't try the good keywords.
It was a hit when I searched for "movie psychological thriller dance on table" lol.
The name is "The Perfect Host", no couple the man I remembered as the murderous *** is in fact "the perfect host"!
All the memories are coming back now .
It's a good movie.