Yeah, totally, working out what is for dinner is great way to learn about people you have dinner with. What foods do they like? Why do they like, dislike, or simply cannot partake in some foods? And less direct but deeper notions like: What makes arguments happen with this person? What happens when this person lashes out on a small scale? Can I react sensibly to this person disagreeing with me?

This and a million other little nuances are super important for successful relationships.