I meant to comment on this at the time, apologies if someone already has.
Illuminati themed party.
The man in the white magic mushroom (?) costume between the Egyptian god Anubis (?) and Alice in Wonderland (Talulah Riley, Musk's twice divorced wife) is Sean Parker, the first President of Facebook.
Parker has always struck me as another of these billionaire characters whose rise is not fully explained. I am guesssing he was selected in the interviews after his hacking, and then later directed towards Zuckerberg.