People tend to be surprised when they learn you once attended what concert?

(I'll tell you what I mean. I once happened to mention to former colleague Heather Lalley that I had gone to a Go-Go's concert long ago and far away. This amused her. Heather liked me but she didn't see me as a Go-Go's kind of guy. So my having seen that show forced her to re-imagine me, which can be a good thing. Right?) 

---

---