Fragor Caelestis
Google
You can't go wrong. Do you want a little taste of the '50-'70 styles? This is the place. They have an incredible amount of choices. From breakfast to dinner, burgers are BIG with many ingredients. They even have the VEGAN choices like the Beyond Meat (not in the menu, you have to ask it), and the Vegetarian ones. The staff is very friendly and professional, prices are good. Not expensive, you pay for the atmosphere, music and the quality of the food.