My son is a Delta Chi. His dues were $4100 in the fall and $3900 in the Spring. That includes the meal plan at the house which gives him 3 meals Mon - Thurs and Breakfast, Lunch on Friday. He has the Greek 55 and used a little more than half of the swipes in the fall. He won’t supplement the fraternity meal plan next year with anything from the school.
I met a sophomore from his pledge class when I visited, point being that they take soph pledges. I can’t speak for other fraternities.