After embarrassing stories were told over Hermione’s protests (from both her "best friends" and from her mom), Harry and Ron were excited to get an unofficial tour of the White House.  In Hermione’s mind, it was far more interesting than the official one, since her version included all the mishaps she and her siblings got up to.  Like how during their first Christmas in the building, they snuck into the larger kitchen downstairs during the White House Christmas Party for the staff.  They were caught by two very kind waitresses, who ended up giggling all the way back to the kitchens.