Chick-fil-A is negotiating a lease for a Union Square location formerly occupied by popular restaurant Bluewater Grill. The fast-food chain, known for its chicken sandwiches and controversial support of antigay groups and issues, is likely to open an outpost at 31 Union Square West. Tthe landlord had been asking for nearly $2 million in annual rent, which is what drove Bluewater Grill to close. It isn’t clear whether Chick-fil-A will take the entirety of the roughly 11,000-square-foot vacancy and what the Atlanta-based chain is agreeing to pay in rent.