...since the NBA All-Star weekend was hosted by Boston. Phoenix gets it twice in 13 years when places like Portland (NBA team since 1970) have never had it and the most decorated City of Boston goes 44 years without hosting it.
Multiple hosts since 1964:
Philadelphia x3
Los Angeles x3 (Plus once in Oakland, once in San Diego and once in San Francisco)
Phoenix x3
New York x2
Houston x2
Atlanta x2
Seattle x2
Chicago x2