[carlosjobim]

Yes, I'm a bit moralistic about this, you're right. I think eating at a restaurant is a skill that a lot of modern people are not taught. It's not about eating, it is about socializing – unless you're going alone. Portion sizes have nothing to do with it, because you can order more food until you are satisfied.

Or, if money is tight and you really don't want to order more than your main meal, you can always have a bite at home before going out.

It's also possible to train your resistance to hunger, so that you can stand being hungry for 12 hours easy (let's hope service is not that slow). The way to train is to skip your meals during a day and wait until you become extremely hungry. Then just don't eat and after a couple of hours it passes. Do this three times on different occasions and after that you are trained for the rest of your life, and will never again become frustrated or desperate because of hunger.