Kathy Kemper might be the most important Washingtonian you’ve never Heard of. A tennis coach to the important and famous, she parlayed those connections into a networker’s dream and this Fall celebrates her 15th year hosting a regular power-broker meeting she calls the INFO Breakfast. Her goal: Bring politicians, newsmakers, business people, even reporters, for an off-the-record exchange of ideas. She’s held 160 so far. For her anniversary gaggle, held last month in the Capitol, Supreme Court Justice Ruth Bader Ginsburg regaled the group with insider tales of how judges host yummy potluck lunches for birthdays and play bridge together. “She described it as the most collegial court in 100 years,” said Kemper.