The twelfth-annual “A Hamptons Happening” was thrown Saturday inside a tent on a lawn so large that in most enclaves it would be considered a field — but in the Hamptons it was just another “private property.”

The event — held to raise money for the Samuel Waxman Cancer Research Foundation — drew a crowd of nearly 500 for dancing, drinks and tasting stations from local eateries, including The Surf Lodge.

“Hopefully people are relaxed and on vacation, and the impact of this kind of disease is something that hits everyone,” said Marion Waxman about why the Hamptons are an opportune place to hold such a fund-raiser. She estimated that the evening would bring in between $500,000 and $1 million.

The evening’s three honorees were Sandra Lee, who spoke about her own struggle with breast cancer; Jayma Cardoso, founder and owner of The Surf Lodge in Montauk, and Lafayette 148 cofounder and chief executive officer Deirdre Quinn, who said of the event, “I lost my business partner to cancer three years ago and meeting Sam and Marion Waxman and learning what their foundation does in cancer research is remarkable. It’s an honor to be part of the ‘Hamptons Happening,’ especially this time of year for such a great cause.”