I was wondering that myself.... They were much more interesting to look at than the actual match. Seemed like they were sitting in the middle of a bunch of Costa Rican supporters.
They were probably cougars on vacation and heard that the US team was playing and were hoping to hook up with the players before or after the match.
that girl in roksteady's avatar.. now i wish she was a nats fan in the stands. probably would've been smiling the 90 minutes