So the Inferior Palace is now the Quad. Thankfully, Hash House is still upstairs. While the Linq construction out front makes getting into the Quad a chore, the good news is you're no longer dodging taxis to come in here, nor is it as difficult to find the escalators to Hash House anymore.
Don't miss the flapjacks (apple cinnamon is my fave, followed by blueberry pecan) and the chicken & waffles is to die for. (tip: order that for at least two) Even a bowl of oatmeal comes out super sized with a large selection of fresh fruit.
They are open for lunch and dinner (but not late; I think they close at 11) but breakfast is where they really shine. Eat here.