Two guys walk into a bar. . . . Er, no, that already sounds like a bad joke. And first impressions can make all the difference in the world.

In a packed Tokyo nightclub, the music's pumpin', lights are flashin' and drinks are flowin'. Two tall blond guys approach a couple of petite, pretty Japanese women.

"Mushi," says one guy with a wink. "Mushi mushi," says the other with a sly smile. The women erupt with giggles, and frantically waving their hands in front of them, scamper away.