@elanorbreton Yes, I play rotationally.
The point of registering my sims with the Employment Office, is partly for immersion, giving them titles and job descriptions that make me laugh or feel happy about; and partly because I do not want to see them in service jobs, but have other plans for their occupation than the game careers. I think the fact that they are played once at least, and in the My Households tab, might convince the game not to choose them for service, I just want to be sure; my crazy kahuna Keala does not sell coffee in a stand.
I regularly come back to my 'broker/fixer' sim, that I upgrade new house appliances with and that works as my handy person; and that sim have had their job description for a long time, and I have never seen them in a service job, when having other households active. They're in the My Households tab as well; but have had their 'job' for longer than the Hoapili household, which took me awhile to load for the first time.
I am not in game right now but can check during the weekend how it fares with the others.