Not the kind of picnic we usually go on, this past weekend we dined in Prospect Park with 5,000 other New Yorkers in support of the Prospect Park Alliance at the PopUp Dinner Brooklyn. All we knew beforehand was to bring our own food, drinks, table decor, and wear all white. Tables and chairs would be provided, as would entertainment. The exact event location within Prospect Park was to be revealed the afternoon of the dinner.