Columbia University is home to many fraternities, sororities, and co-educational Greek organizations. Approximately 10–15% of undergraduate students are associated with Greek life. Many Barnard women also join Columbia sororities. There has been a Greek presence on campus since the establishment in 1836 of the Delta chapter of Alpha Delta Phi. The InterGreek Council is the self-governing student organization that provides guidelines and support to its member organizations within each of the three councils at Columbia, the Interfraternity Council, Panhellenic Council, and Multicultural Greek Council. The three council presidents bring their affiliated chapters together once a month to meet as one Greek community. The InterGreek Council meetings provide opportunity for member organizations to learn from each other, work together and advocate for community needs.