Volunteering is so rewarding, and there are many opportunities with dozens of groups here. I look forward to going to work at my volunteer jobs, and I think part of it is that we have the
freedom to say "no" to certain things and scheduling is according to what you can/want to do. It's also nice to be able to leave on vacation or to travel, without feeling so guilty as we did with paid jobs.
Also check out the many courses and trips at the Lifelong Learning College, here. See the course catalog on the left, under "Home".
http://thevillageslifelongcollege.com