This is a little bit confusing, and maybe my use of the term "international" was not precise enough. The United web site explains the perks of United Business and United Business First. The locations discussed in this thread (Canada, Mexico, Caribbean) are ones served by United Business and there is nothing listed in the perks for that class of service that provide for club access. That was also my experience the last time I flew one of those itineraries, which admittedly was a few years ago. By contrast, United BusinessFirst includes "most flights to Africa, Asia, Europe, India, the Middle East, South America and the South Pacific, and flights between Tokyo and Seoul and Singapore." United BusinessFirst allows club access according to their web site. That is also a long-standing policy. I would really love to be wrong about this one. Can someone show me where club access is granted on flights in UnitedBusiness?