My sisters and I just composed an eight verse limerick for the occasion of the retirement of my parents' sole employee after 56 years with the business. We took turns reciting the verses at the retirement party, as well as making up a memory book with the limericks and photos for him to enjoy in his dotage. He worked till he was 75, taking on more and more of the work as my parents became less able.
As the limerick was filled with inside jokes, it wouldn't be funny to folks who don't know the parties involved, so I'm not quoting it here.
We have also created limericks to celebrate occasions like a chartered Caribbean sail cruise, lampooning ourselves and the crew members.