Retiree volunteers provide many valuable services ranging from museum docents to hospital volunteers. The best volunteer jobs provide a sense of helping others as well as opportunities to get out of the house and socialize. Consider passing on your expertise to the next generation as a mentor, tutor, coach or instructor. You can also follow your interests by volunteering at a library, national park, museum, garden or at theater or sporting events. Many organizations provide social events for volunteers and opportunities to meet other retirees.