This article has the locations mixed up.
She was with Cher in Provincetown, MA on the 21st.
Then she was in Southampton,NY (New Haven is part of Southampton) on the 28th.
As far as I know, Cher wasn't there for that one...the pic with Cher in it is from Provincetown.
Yes she did wear that same outfit for both of the fundraisers.
(I still haven't tracked down the designer...anyone know?)