"Well, you take notes if you'd like." Z smiled a bit sheepishly. " But I'm no good at properly explaining music stuff, I'm all enthusiasm and a bit of knowledge."
Mikey was a Gryffindor, he wouldn't care about blood purity and honestly, it was common knowledge in Slytherin that Z wasn't a proper pureblood. Discussing it with Mikey would not be the end of the world.
"My mum's a halfblood and her family's close, so she knows a bit about muggle culture. Of course it's mostly American muggle stuff from the late 70s and early 80s, so it's pretty much useless, but she made sure we grew up knowing our muggle relatives and a bit about muggle culture. We spent most of the war in the US and I finished up school at one of the few integrated muggle-magical high schools and then took some courses at a muggle university while I was working with Wilford Danson, so I've picked up more then the average witch."