Iron Hill Brewery & Restaurant is the mid-Atlantic region's fastest-growing restaurant group. Started when the craft bubble started to "burst" in '96, the group is slated to open their 9th location in Philly's Chestnut Hill later this year, and likely open another unit every year for the next five. The concept brews their own beer, but director of brewing Mark Edelson has some interesting observations about system trends that apply to all on-premise beer sales...