So it was a public event attended by 450 people:
https://www.mountsinai.org/about/newsroom/2012/dubin-breast-...
https://www.businessinsider.com/dubin-breast-center-benefit-...
Even names match up, but oddly the date is different.
Your links are for the inaugural (first) ball in December 2011; OP's text referred to a second annual ball in December 2012.
looks like we have it. in the end it's pretty mundane...
Your links are for the inaugural (first) ball in December 2011; OP's text referred to a second annual ball in December 2012.