It costs $1,000 to $2,000 to sit on one of the green velvet couches in what was once Chung King Studios on Centre Street in Manhattan. There, a group of Wall Streeters, media and entertainment executives, real estate moguls and celebrities have gathered to see performances — which amplify and raise money for different social causes — by Paul Simon, Nile Rodgers & Chic, Trombone Shorty, Elvis Costello and, most recently, Maren Morris, at a venue in the Hamptons. But don’t bother looking for tickets online — they’re not on sale to the general public.

“Sponsors bring in their people and the rest of the room is curated to expose the nonprofits to a select group of people they otherwise would not be able to connect to,” says luxury real estate broker Greg Williamson, who co-founded The Soho Se

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