In addition to prohibiting freshmen to join sororities, Duke also stripped the sororities of the housing formerly set aside for each sorority. Many other special interest organizations have been given set aside housing, but sororities no longer have specific areas for sisters to live together.
This has not been updated, but look at the special interest groups that have specific housing:
https://studentaffairs.duke.edu/hdrl...3vPbzfJLvn1PkM