Even as the sun was rising, there were still people in costume at the bar and dining at Katz's. The fact that there's a happy hour beginning at 7:00 am probably doesn't hurt business. No! Wait; that's the rival Houston Katz's! I'm hungry for a potato pancake right now . . . BTW, beginning at 4:00 am, seven days a week, Hill's Cafe is selling Round Rock donuts baked on the premises.