Musicians?
brianto2010: I can play both violin and Bb clarinet; I started both in elementary school. However, I only play violin now in high school.From your link:
"music: n. A common extracurricular interest of hackers..."This definition is not just limited to just playing an instrument, though. It also talks about music appreciation and genres of music.To strictly follow that definition, try asking if we are significantly involved with music in some way.