Cafe autonomy - help us understand how it works?

Other sims will go order coffee and croissants but your sims will do whatever you want them to do. Either order food or coffee if hey are hungry or just sit down and chat. I put computers in a cafe I have in my game so other sims will sometimes sit and use the computer while drinking their coffee. You can select the different foods and drinks after you click on the order food/drink interactions.