Who would imagine finding Peruvian cuisine in Austria? Well, we did, and it’s near home for us, and well worth the trip if you are outside the Ring. It’s informal, but service and food makes it worth the trip. http://www.qero-viena.at/
In response to the question: “how kid-friendly it seemed?” I recently asked, and they place families in the lower level. They have one highchair, but no booster seats. It would be best to call ahead.