Re: Do you mention being a drummer on a day job interview?
I think it's ok to tell people about your hobbies during a job interview if asked, but I can imagine it being dependent of what industry you work in. I am studying industrial design engineering, and am expected to be both intelligent and creative. I will get my master's degree in engineering in about a year and a half, maybe a little more, which proves my intelligence. Me having been an active musician during my time as a student (with a minor in Music) proves that I am creative. I am putting my hobby as drumming and my teaching work on my resumé for sure!