When we started, we wanted to know how busy our favorite coffee shop was. We would have walked five blocks through negative twenty with a wind chill and two and a half feet of snow. And it just seemed kind of ridiculous that there was an a p i for the weather, but there wasn't an a pi for how busy a place was. I can say, six and a half years later, it was definitely not a weeka, a week end project, it coud have ben a long week.