You may know the band cloud cult from an animated commercial that aired during the Super Bowl a few years ago. In exchange for the work, e-Surance helped fund some of the band's costs for greening the recording of album. The fact that Cloud Cult chooses deals like that--writes heart-warming songs, and travels across the country to perform for good causes--may have you wondering if they are for real. But doing good and staying positive are deeply embedded in the DNA of Cloud Cult. This evening the band will perform a live acoustic set during a yoga class at the At Om Yoga studio in Concord. It’s a benefit for a local child with pediatric cancer. I talked with Craig Minowa, singer, guitarist, and leader of Cloud Cult before they headed to New Hampshire and can say that the whole kind-hearted thing is not just PR. In fact, I told him that they are just about the least cynical indie band I can think of.