2. University of Illinois (Urbana-Champaign, IL)
The University of Illinois, home to the world’s largest Greek system, sees almost a quarter of its 33,000 undergrads pledging. The campus celebrates “Unofficial,” a pre-Saint Patrick’s Day celebration, and the vibrant bar scene in Champaign and Urbana adds to the energetic cultural mix, making it a hub for lively social gatherings.