Great image. The Hershey Bears were also part of the EAHL. Here is an interesting link to the team and the arena's history. There is a picture of your PC image. I am guessing the Boston Olympics were just in town for an early season game or tournament. Harrington may just be stating how nice the arena was (as it was the class of the league), not necessarily implying he was training his team there for any extended period.
Edit: I was typing at the same time as Butch, and didnt see his reply. His take may (probably is) more accurate then mine.
http://hockeyscoop.net/hpa/
image.jpg