The Kennedy Center’s International Ballet Festival presents the rare chance to see major companies daning side by side. “This first week of the festival, featuring the Royal Danish Ballet, the Bolshoi Ballet and ABT performing at the Eisenhower Theater through Sunday, is not to be missed. The evening is buoyed by healthy competition; each company is trying to outdo the others with its best dancers and signature choreography. Does the festival offer a true representation of the performance styles that distinguish these troupes? Not exactly.”