It is easy to overlook, but hard to forget-- XYZ is open for brunch on Saturdays and Sundays, opening at 9am.
I've had breakfast three times and each time has been fantastic-- you need to pay attention to the specials. The best breakfast I've had anywhere in a long time was a cornmeal pancake daily special with fresh blueberries and some jalapeno butter. Really, perfect!
They aren't as crowded as later in the evening, so it isn't too noisy. The service has mostly been very attentive and fare has been great.