We had our own cook, and so do most of the sororities. We lucked out though. Our cook was a former gourmet cook/restaurant owner in town. I miss his cooking sooo much!!
His wife (also a cook) worked at one of the houses just up the street, so they would trade cooking tips and plans with each other. We got to have a weekly menu and if there was something we wanted, you just asked him if it was possible. I don't know but I'm pretty sure that the meal was included in the housebill.