It should be a restaurant, because this is a city, and, in a city, restaurants and houses can be located next to each other. That's it. There are parts of Detroit where uses are well segregated, but this isn't it. If you don't like hustle and bustle, don't move to the heart of the city. I don't care if you moved there in 1867, 1967, or will move here in 2067. Its a city, its for people to live, work, and play in, and there's just no reason to block a restaurant in this building.