I volunteer for several nonprofit organizations, but they deal with things I love, so I doubt if they really count. They certainly don't seem like work.
I am the treasurer for a local art group, and run the website for their annual art fair among other things.
I am the phone answerer for an environmental/wildlife organization, and handle their email traffic too, which includes sending out the monthly newsletter to the 150 or so subscribers.
I sing at the drop of a hat for anyone who wants to hear me; my church, the local symphony choir, and 2-3 other gigs every year.
It's all TOO much fun to be considered admirably worthy works!