There is no better place to have an all star game than on the floor, (or part of it) of the most historic basketball franchise in NBA history. Put together footage of the teams and players of all the championships hanging from the ranters, and show the crap out of it. Bring in every ex-Celtic of the championship teams for a meet and greet.
Introduce, or reintroduce these young star players, and fans to the NBA's most historic franchise. Pray for good weather, and I'm sure the night life and eating establishments in Boston will more than hold there own.
Who know, maybe we'll get noticed by a free agent or two.