The Rack Menagerie (the website run by Tyler Henry) is an allusion to the play The Glass Menagerie (1950) by Tennessee Williams.
Dr. Melinda Warner (Tamara Tunie) says: "My husbands Alpha Phi Alpha". This means that he must have attended Cornell University in New York, where the Alpha Phi Alpha fraternity was founded on December 4, 1906, and was established for African American Men. It is the oldest intercollegiate historically African American fraternity.
The mentioned "Tau Omega Fraternity" is fictional. The fictional fraternity is mentioned in several episodes: S5.E12, S14.E6, S14.E20, S17.E8, S22.E6.
The mentioned "Wallace University", is fictional.