“Design classic” is an overworked phrase, but it’s just right for the Emeco Model 1006. Created in 1944 for the U.S. Navy and still in production, the chair is known for its lightness and near indestructibility. (Not to mention its sudden omnipresence in upscale cafés.) Though the originals run about $300, this highly convincing knockoff is just $60 at White Furniture (353 Broadway, near Franklin Street; 212-966-6711 or whiteonwhite.com), a downtown shop specializing in excellent copies of Eames chairs, Saarinen coffee tables, and the like. Cheaper than a seat on Broadway, and far more comfortable.