In America, we eat dinner anytime from around 6 - 8 PM with dinners usually not lasting any longer than an hour and half.
When Americans go to college, it usually represents their departure from their home town, and friends from home usually find different cities/states to live for the rest of their life.
When Americans talk to each other, whether it be walking down the street or at a restaurant, they talk at a moderate to loud volume and use body language cues a lot to aid in their communication.
Americans are known as workaholics. It is not rare for an American to work 70-80 hours a week at their job.
There are various different levels of friendship in American culture, and Americans are only close with a select few people.