The man beaten to death is not Le (La?) Tenia. I’ve only seen it once myself, but several people I know who’ve seen it more than once confirm that the wrong guy gets his skull smashed in.
He’s one of the guys masturbating in the club. I couldn’t tell you which one, but his cameo comes early. No pun intended.
I have absolutely no desire to ever sit through this movie again, but it was very well made. Philosophically kind of facile, which is why it’s not worth putting myself through it again, but damn, I’m glad I saw it once.