At the end of April I noted that the Greek restaurant Opa! was opening mid-June, and I have since learned it will open by the end of June, and will serve the same dishes at their other locations. Check out their menus here.
The side of the bar is illuminated behind the stone:
Above the restaurant are various offices, although I still think it would make for a cool apartment.
Opa! is located at the corner of N. Main St. and Lincoln Ave. in Walnut Creek