Lesson learned, IMHO. The general rule is: always call ahead to check when a place is open to the public and/or there is no cover charge.
I would email the scheduler and tell them that you want them to reassign the shop, and suggest that the guidelines include a statement that, due to concerts and other events that may pose issues, the shopper needs to call a few days in advance.
btw, if you tell us which MSC, members may know how to "gently" suggest this to a project manager there.
As for fault; no one needs to be called out over this. Chalk it up to education. And, as my momma always told me, "Education is expensive. But, still a good investment."
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.