NEW YORK CITY—This dance school image was part of a photo story about upper-class children taking dancing lessons and being taught social graces. The lesson pictured was conducted in the lobby of a ritzy Park Avenue building to the music of a live four-person band, part of the social set Lester Lanin Orchestra that used to play at many of the New York balls and social events (and perhaps still does), 1977.

Taken from Slate’s always amazing MAGNUM photo gallery.

Watch the Mockingbird favorite Metropolitan if you want to see those kids all grown up.