What different is here and my country?

In America the college students often drink. Here, at 21 years old, people can drink, but in my country 18-year-old people can drink. Here many people drink on the road. In my country they always drink inside. If they drink outside, other people might consider them to be tipplers. At SIUC, the people just drink on Friday. In my country, if they want to drink, they can drink every day. They never worry about whether the next day they have class or should go to their company. In the U. S., when people drink, they think about tomorrow having some important thing. Americans are sometimes very crazy.