Joe Bastianich and partner Jeff Zalaznick (of AlwaysHungryNY.com) have launched Dine Private, an online booking service for upscale private dining in the city — something of an Open Table for large parties. The website is designed to take the hassle and pricing murkiness out of booking private dining events. Some of the restaurants that signed up for the launch include Bar Boulud, Craft, and Quality Meats. The launch party was held at Bastianich’s own Del Posto last night, where actors were hired to portray party scenes before a guest list of A-listers, including Daniel Boulud, Cesare Casella, Seamus Mullen, and Leah Cohen. Mullen was spotted nibbling crispy pork skin, snipped from the two whole suckling pigs roasted for the night, while Cohen gawked at Boulud, who she says once autographed a cookbook for her.