Earlier this morning, it seemed likely that Shake Shack would be a leading contender for Central Park. But we just talked to Union Square Hospitality Group president David Swinghamer (regarding other matters — stay tuned for a Citi Field report), and while we were chatting, Danny Meyer’s business partner dropped this bomb on us: "We think [the Sheep Meadow café] is an amazing site, but we elected not to respond to the RFP [request for proposal]. It could be an incredible place and someone is going to have a nice little business there. But it won’t be us." This bodes well for Dovetail, which did respond to the city’s call.