CRAZY EIGHTS: Select members of the social set are getting ready for a party “of Olympic proportions” on Friday — also opening day of the Games — when party planner David Monn will open his Water Mill, N.Y., home for 200 of his nearest and dearest. Invitations were hand-delivered to guests, in Lucite boxes inscribed with the date 8.08.08. “It’s as simple as black and white,” read the note, which arrived with an assortment of black-and-white M&Ms stamped with the party date. Shun Lee Palace and East Hampton’s The Laundry restaurants will cater the East-meets-West-themed affair at which Marjorie Gubelmann, Barbara Gladstone, Martha Stewart, Richard Meier, Jock Soto and Samantha and Aby Rosen are expected. After dinner, a 26-piece orchestra will play for dancing. Let the games begin.