The Great Hall is where free meals courtesy the College of Necromancy are given to its members. All sorts of manner of food is conjured up, fine wines, poultry dishes, cheeses, breads, salads, and the like. Simultaneously food for its undead members is conjured as well, feet, arms, heads, as well as bottles filled with the most exquisite of blood.
It's not uncommon to see living and undead sitting next to each other eating vastly and ghoulishly different things.
Here it is also where some new members are initiated