Note this section of a NY Times story about Barack Obama's photo-op at a bowling alley.
Roxanne Hart, a 43-year-old gal from Altoona, asked if he wanted to bowl with her. Mr. Obama and Mr. Casey shed dress shoes for bowling shoes—a blue and white Velcro number for Obama, size 13 ½ — and entered their names into the overhead monitor. It was BAR and BOB against ROX.Um, 13 and a half, eh?