I love this pseudo-diner when I visit Toronto. I hate calling it "upscale" comfort food because it sounds douchey. I'm hesitant to call it "healthy" comfort food, because you would then assume it doesn't taste as good, but it does.
I'll just call it higher quality, fresh, better versions of your favorite comfort food classics, like fish and chips that is pan seared with a crispy crust rather than deep fried heavy batter. Sloppy joes with guacamole, homemade condiments, etc.
It is quiet, casual and perfect when my sister and I are looking to avoid a 'scene' at night.