The community consists of Drake students, but students are not the only people in the area. While some students simply go to drink, most are there to socialize. Perhaps wanting to drink is a social thing to do. Bars are not the only place students have to socialize. Drinking isn't the only activity available on any given night.
Options do exist.
Movies, restaurants, video arcades, bowling allies and numerous other places can be found around town to break the typical weekend trip to the bars. Unfortunately, students may feel pressure to be where the rest of campus is hanging out. Too often, college is seen as a big party. However, being a college student does not have a drinking prerequisite. Enjoying a drink now and then with friends is not evil, of course.