Most students party once the sun goes down. There is almost always some type of house party going on off campus or sometimes the different Greek organizations throw parties. They'll pass out fliers during the day to students. If students aren't partying, then they're probably at the club. Not very many students go clubbing during the week, but on weekends, the club is packed with college students. Some students say that the best clubs are the ones for those 19 years and up.
While many students party most of the night away, you don't have to feel pressured to do the same. There are other things to do when darkness falls. Perhaps catching a movie with a group of friends or treating yourself to dinner. You don't have to party just because the majority is doing it. You can have more or just as much fun by doing something different that doesn't require you to wake up the next morning with a throbbing head.