US hamburger chain "Steak 'n Shake" is going to roll out payment by BTC on May 16. They are going to roll this out at ALL of their restaurants. While Starbucks, Burger King, Subway and a few others have experimented in the past with BTC payment, none of them have done this on a large scale. Too bad there is only one location in my city, it's far. Still, I know where it is, and when I'm out that way, I'll go by.