Sea change

Seahorse (Union Square)

RESTAURANTS • First Person

Just after its 5p opening last Wednesday night, I claimed one of the few empty seats at the vibrant central bar of the reborn W Union Square’s new restaurant, Seahorse. Sunlight poured in through slats on the west- and south-facing windows, drenching the room in a dreamy autumnal late-afternoon glow. Waiting for a friend, I wat…