Into a flower-decked ballroom in Washington one night last week swarmed a crowd of 1,500 to dance and sip champagne punch. But it was no ordinary party; many of the guests eyed each other critically to see just how well they executed their "box steps" and such advanced maneuvers as the "triple twinkle" and the "conversation corkscrew." The guests were almost all students of Arthur Murray, most successful dancing teacher in the world. The occasion: opening night of Murray's 308th and most lavish dance studio.
The new studio, which cost $150,000, is run under a franchise from Murray by Mrs....