Mr. Retter told the kids that he was teaching adult tap dance in LA when his big break came.

WSJ: Broadway Grows Up

It would be years before I came to realize the Pill had other functions besides paying for my tap dance classes.

CNN: What 'The Pill' did

He earned money by "hoofing, " a form of tap dance.

NPR: StoryCorps Griot: Dancing Feet

Hill began tap dancing at age 3, and while still in grade school, he starred in the title role of the Tony-Award winning Broadway show, "The Tap Dance Kid, " during its national tour.

CNN: Dule Hill of 'The West Wing'

He might as well ask a camel to tap-dance on its hind legs.

CNN: Review: 'Body of Lies' flat

The ugliest of these pigeonholes suggests a comparative advantage, anyway: to be thought to tap-dance well implies that you can, at least, do that.

NEWYORKER: I, Nephi

The two men who wrote this book probably had the best intentions, but the topic of working moms is a tap-dance recital in a minefield.

NEWYORKER: Confessions of a Juggler

You hear the creak of caskets opening, the tap of tiny feet as cherubs dance excitedly, and the clanking of cast-iron doors as angels go about their business on narrow lanes lined with weeping widows.

BBC: The Recoleta Cemetery: Silent theatre and city of the dead

And the whole competitive dance is really being focused on the services that hardware users tap into.

FORBES: Google Maps Loses Another Customer: Amazon's Kindle