When Annie is in Joan's office, we see that Joan graduated from Penn State University with a Bachelor of Science in Political Science from the diploma on her office wall.
Annie complains that Joan's order to return to the Etxarte restaurant is going to be interpreted by Xavier as her (Annie) wanting to sleep with him. When the show cuts next to the Etxarte, the song playing (in Spanish) says "My mother, my mother, we are sleeping together between your arms".