A streamline version of the upscale Galleria restaurant, this downtown resident provides a down-to-earth, yet tempting, menu.. In Short Among the bustling walkways of the downtown tunnels resides this simple and efficient New American restaurant. The original Post Oak Grill was an instant success when it opened simply because Ethel Fisher and Manfred Jachmich from the popular Ruggles were at the helm. They give diners what they expected: traditional classics with a modern twist. Sticking to just breakfast and lunch, the menu at this sister location is less extensive but the charm and taste remains the same.