I dance, act, and sing with a non-profit dance group called Gaelic Thunder Irish Music and Dance. We do a lot of volunteer work-- charity concerts (all proceeds to charity), student days at the Renaissance Festival (teaching school kids about Irish art, culture, and history), and school tours (usually elementary and middle school, though a few times we have gone to high schools as well). It is a lot of fun. I have also volunteered for campaigns in the past (such as the Mahoney for Governor campaign a couple years ago) and done stuff with NHS and church.
I think it is good to do volunteer work and tell about it. This shows other people (especially youth) that it is "normal" and perhaps even "cool" to do volunteer work. It also gives people an idea of the broad spectrum of different kinds of community service they can do--I know I for one am involved in a different sort of volunteer work, but I think the work is just as valuable as more "service oriented" (working at homeless shelters, etc) volunteer work. People need arts and culture in their life! ESPECIALLY in America, where the average person has so little knowledge of the cultural influences of their own country!