Revisiting Ann Arbor for the first time in many years, I was finishing off a Quint at Krazy Jim's Blimpy Burger when a tablemate reminded me that the de rigueur dessert for true-Blue Michiganders is ice cream at Washtenaw Dairy (602 S. Ashley St.). The outdoor benches were well occupied after dinner hour, and the line inside provided plenty of time to pick a flavor and configuration. I was a classicist and chose a hot fudge sundae made with custardy French vanilla ice cream and topped with chopped peanuts. Alas, there was no whipped cream and, curiously, no Maraschino cherries; but this simple dish loaded with Sanders hot fudge was an ideal end to a summer's day of eating around town.