Agern is an upscale Nordic restaurant in Grand Central. And if that description just made you think no thanks, you should actually reconsider. Instead of the bland, perpetual-winter stuff that you might be imagining, these people serve pork belly, grilled mackerel, and salt cod croquettes with a dipping sauce that should be on the tables at every Long John Silvers. The dinner prix fixe is pricey ($175), but at lunch it goes down to $55 for two courses, and it’s much easier to get a table than it should be. So don’t hesitate to have your next business lunch meeting here.