@Naodyr the option you mention, to work off hours, will only appear when your Sim is a salaryman. In other cases just do some work related tasks. I think you explained it perfect.
Have fun playing. 😉
Not true my sim is a chef and you just click the sim and it pops up
Yeah, what @breannanotestine said, my Sims were concert musicians and conservationists and they could go to work on their off hours. I would just click them and it was an option.
They would also do it autonomously if I wasn't watching them like a hawk, which was super annoying when I had other things I wanted them to do.
