SPAC was my favorite venue, when it was run by the state. You could go to a ticket window, and ask for (Subscriber) 'Cancellations'. - Saw many GREAT shows there, between the '70's, and '90's.
You could always find a great seat for face value.
Nowadays, you are corralled around like cattle, and I paid $36 for two beers @ a James Taylor show.
I said 'that's it'. Never again..
Interestingly, Tanglewood, just over the Mass. line, does not have these issues, with treating customers like sh¡t.