In N L R B v. Sightseeing Guides and Lecturers Union, 310 F.2d 40 (2d Cir. 1962) the Court of Appeals for this circuit affirmed a decision of the National Labor Relations Board and held that the sightseeing bus tours industry in the City of New York affected interstate commerce, pointing out that a significant portion of their business is secured from out of town travel agents and railroad agents.