Visited Fried Chicken Co. today, and upon paying for the meal, was asked to choose a number, any number, between 1-90 (not 99, 90). I've no idea behind the significance of the range of numbers, as once I questioned it, the till operator didn't know!
I didn't win, however I do think it's a brilliant promotion to have, as it adds a bit of fun into a usually rather mundane and 'normal' activity, that eating/lunch usually is.
Keep it up!