Steps from the White House, one couple hosts a romantic, sophisticated fete with pink accents on everything from the cocktail bar to the bouquets—and the most adorable flower girl this side of the Potomac River.

Elizabeth and Louis didn't want a big band crowding their limited outdoor tent space, so they hired five musicians to keep guests on the dance floor all night long. "They learned our first dance song, Grow Old With Me by the Postal Service, and they nailed it," Elizabeth says.

Photo: Kate Headley