Do we know if there are really 100 attendees to this meeting ? If that's indeed the case, is it unusual to have that many people within a company capable of influencing things ? Any other examples in the corporate world ?
I'm not sure this is a mere corporate holiday, it sounds like; in addition to company stuff (reviews/headcount) real long term strategic decisions get made/debated in these top 100 gatherings.
I can't find any clear examples on the net, but you should watch The Smartest Guys in The Room.
Pretty sure there were lots of people that went with him on crazy corporate holidays.