Colleagues and old friends on the same list
A retirement party is two guest lists pretending to be one — the people Henrik worked beside for thirty years, and the friends and family who were there long before the job. A work group chat can't reach the second list; a family thread can't reach the first. A single invitation page does both, and everyone confirms to the same place.
Corporate send-offs don't have a dedicated design in My Joyfullday yet, so you start from the nearest celebration setup and write your own plan onto it. The general tools are exactly what a mixed list needs: a shareable page, replies tracked against names, plus-ones, reminders, and a password to keep a surprise quiet until the day.