I assume you're somewhere other than the US? Usually when I go out to eat I end up with two meals: the half I eat at the restaurant and the other half I eat the

I assume you're somewhere other than the US? Usually when I go out to eat I end up with two meals: the half I eat at the restaurant and the other half I eat the next day. American portion sizes are ludicrous but most restaurants won't ever bat an eye at wrapping up the rest of your food for you. Even a $200 per head restaurant will do it. The only places that won't are the high end places where you're getting a $400+, 19 course tasting menu (+$150 or more per person for wine).