AS220, part of the downtown Providence art gallery movement that has stalled somewhat in recent years, is probably one of the better known venues for appreciating local art. It's also got a nice little bar and counter cafe on one side of the fairly large ground floor space on Empire Street as well.
I went there for lunch and had the white bean soup -- loaded with green leaves, which I tossed out, and heavy on the garlic and semi-fried bacon, it tasted just OK. The toasted bread was good.
Oh, and since it's order at the counter and pick up your food when your "playing card" is called, I had very little observation of the level of quality of service.
But there's little else along Empire Street for a quick bite at midday. Just go without any great expectations.