Here are two recent pieces from the New Yorker.
The first is for Michael Arenella and His Dreamland Orchestra's Christmas show.
The thing I like about this one is that the front row of musicians are 100% C, 100% M, 100% Y, 100% K, while the back row are 0% C, 0% M, 0% Y, 100% K. When it prints, the front row really pop out from the back row.
The second picture is for Philip Glass's 75th birthday concert with the American Composers Orchestra at Carnegie Hall.
I used the same technique as the Arenella pic, and while it looked good printed, I'm not as big a fan of it as I am of Arenella.
New Yorker commissions usually have a very short turn around of a day or so, so if I'd had more time, I would have drawn all the musicians rather that done silhouettes.