What good is having power unless you give it away?

The quickest and easiest way of dispensing power–and career advice–might be what I saw one night last week in Washington, D.C. It’s called Minute Mentoring. It’s speed dating applied to mentoring.

This pairing of role models and wannabes was beautifully orchestrated chaos. Last Thursday evening, 15 high-powered D.C. women parked themselves inside 15 offices at law firm Bracewell & Giuliani, and in a complex round robin of 10-minute sessions, advised 15 trios of young women how to navigate their careers.

Minute Mentoring is the brainchild of Dana Perino, the former White House Press Secretary in the Bush Administration. She’s now at public relations giant Burson-Marsteller. The idea to apply speed dating to career counseling struck Perino last May, after she gave a speech to a group of young female Congressional staffers and as usual, they converged around her afterwards, asking for “just 15 minutes of your time…I know you’re really busy, but please….Can you just have a quick cup of coffee with me?”

Perino’s notion of “one-stop shopping” for career advice gelled two months ago on her way home from the Fortune Most Powerful Women Summit. On the plane, she was sitting in a row with Bracewell & Giuliani’s Susan Molinari and Dee Martin, who were fellow Summit attendees. They loved Perino’s idea–and they said, they’d host a Minute Mentoring event.

On Thursday at Bracewell’s K Street offices, the 15 mentors who dished advice hastily (a loud whistle marked the start and stop of each 10-minute session) included CNN political correspondent Candy Crowley, Meet the Press executive producer Betsy Fischer, former Clinton White House Press Secretary DeeDee Myers, APCO Worldwide CEO Margery Kraus, Pfizer government relations VP Maria Cino, and Fortune Washington Editor Nina Easton, as well as Molinari and Perino.

Over the next couple of weeks on Postcards, my colleague Jessica Shambora will dish to you the career advice and lessons we heard. Meantime, check out this story about the Minute Mentoring event in Saturday’s Washington Post.

And since we’re on the topic of mentoring, I want to mention that the makers of a documentary film called Miss Representation flew in from California to film Jessica at the Minute Mentoring event. They had previously interviewed both Jess and me since we’ve been studying women and power–the topic of the film–for years. They’re so impressed with Jess, as a young star journalist, that they’ve decided to feature her prominently in the film, due out next year.

Good for Jess. And good for mentoring in general. We at Fortune, incidentally, have three programs, through the MPWomen Summit, to help women leaders mentor: a Fortune-U.S. State Department Mentoring Partnership that each year brings rising-star women from developing countries to shadow women leaders in the U.S.; a mentoring partnership with Exxon Mobil , that pairs math and science experts in the MPWomen community with college students; and a new partnership with American Express to find extraordinary female entrepreneurs and expose them to Fortune 500 executives and other female leaders.

Sharing the power is what it’s about, really.