Inside the exclusive, stealthy club where future tech moguls are born

I’m at a New York City heliport in a waiting room so packed with people that the obviously overwhelmed staff are struggling to move through the crowd to check everyone in. While the staff of Blade, the "Uber for helicopters" company, is used to a well-heeled crowd, the current group may be a bit over the top even by their standards. 

Across Blade's three Manhattan heliports more than 200 people are boarding choppers bound for the Rockefeller Estate’s “playhouse,” a sprawling two-story building where members of the Rockefeller family still meet twice a year.