I’ve seen lots of instrumental rock bands, of varying styles, and probably wouldn’t have thought of going to see Russian Circles last week, but a friend was really excited to see them, so I was amenable. I knew them a little bit — I mentally lump them in with bands like Red Sparowes as epic, serious-minded, metal-tinged instrumentalists. This seemed pretty accurate — the show was good but a little too earnest. The crowd was about 90% male (even real metal shows have more chicks), and mostly on t…