BEIJING — Two of the world's leading ballroom-dance instructors were ordered yesterday to repay their most prized client, a Hong Kong investment banker, the $7.5 million-plus that she had paid them to train her in the art of the salsa.

At the end of a case that has both fascinated the territory and provided it with an embarrassing reminder of how its super-rich indulge their whims, 61-year-old Monica Wong won back the deposit that she had given Gaynor Fairweather, the British former world Latin-dance champion, and her husband, Mirko Saccani.

She had sacked the pair after a disagreement during a lesson held in a restaurant when she claimed Mr. Saccani became abusive, calling her a "lazy cow" and telling her to "move your arse."

When she went to court, they countersued for the remainder of the fees that she had originally promised them, 120 million Hong Kong dollars or $15 million.

A string of witnesses from the glitzy world of dance and the even glitzier world of Hong Kong society had given a fascinating glimpse into the passions and neuroses of the city's normally untouchable millionaire business class.

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