IN THEORY: For the reopening of the Cooper Hewitt Smithsonian Design Museum at 2 East 91st Street in Manhattan, the visitor experience and shop staff will be outfitted in Theory. The male and female staff will wear classic Theory suits (black jacket, black pants and white shirt), with the Cooper Hewitt logo embroidered on the breast of the jacket. The men will also wear a black skinny silk tie. The museum reopened to the public Friday. “Like Theory, the museum focuses on design and innovation, and we felt that this was a natural partnership for our brand,” said a Theory spokeswoman.