According to the NC State website,

The Witherspoon Center is the location of the NC State African-American Cultural Center. A key building in the new student services courtyard, the student center annex is part of a student services core that includes Harris and Pullen Halls. These buildings house services available to students or created by students, separate from the solely academic activities on the main part of campus. Along with a planned student health services building, Pullen Hall and the Witherspoon Center form a landscaped courtyard.

The center was intended to replace and expand several facilities in the existing Student and Cultural Center. The Witherspoon Center was completed in the fall of 1990, and offices for student government and campus publications were soon relocated to the building. On the first floor is a 500-seat theater used as a multi-purpose space for the cultural center and student center offices. A gallery, library, study area, and assembly rooms for student government are located on the second floor of the building. More offices for student government are on the third floor, along with the cultural center, WKNC, and publications offices for the Technician, Windhover, and the Agromeck.