"I Know the Chef" is a subscription-based application that helps users get personalized concierge service at trendy restaurants. Wallse, BLT Steak and Fatty 'Cue are among the 40 hot dining spots in New York City included in the program so far. Users plug in their preferences and are greeted by the restaurants' staffs as VIPs. "Hospitality is all about relationships," founder Joshua Stern says. "If you go to a restaurant and you happen to be with a friend of the owner, you're going to get special treatment. We are that connection. We know somebody."