Several elements are notable about the burger bar called Burger Theory that opened this month in Phoenix. One is that the restaurant is not just part of a new Holiday Inn complex; the concept is owned by Holiday Inn, a unit of InterContinental Hotels Group. And perhaps because it is sited within a Holiday Inn and needs to be attractive to as wide a clientele as possible, Burger Theory is the quintessential 21st-century burger bar with all the “hand-crafted and local” benefits we’ve seen become commonplace.