This year, in the interest of a more sustainable diet, Mark Zuckerberg started only eating animals he personally killed. Sure, Zuck can afford to slay a steer or 20, but he raises interesting questions about our individual consumption patterns. The expanding Bicycle Music Festival has been experimenting in this very concept as it relates to the live music fest. This year a free all-day, all-night outdoors affair featuring more than 12 bands and performing groups took place in two different city locations — with a three-piece band and opera singers performing while the entire festival biked from one site to the other. Powered by volunteers on generator-bikes — which occasionally lost their charge — attendees learned a lot about party-time energy costs.