Residence halls*.
The bathrooms are disgusting, you'll hate your roommate within two weeks, and the rules and occasional unplanned 4am fire alarms are awful - all of that is true.
I, however, happen to have made literally all my friends in college in my hall, and my hall had most of the students who are most involved in leadership and organizations despite having less than a fourth of all first year entrants.
If you're an hour or more away from your school, live on campus for at least a year. Try it out, see how it feels. It's different at every school and it's different for every person but it's an experience that you should have.