Main Street Artists Gallery has 30+ artists some of which do abstract work. ( !!! ). That's Johanna Griggs on the left with Kathy Peters nearer the door. Ms. Griggs' former husband (deceased) is represented by the gallery and Ms. Peters is a patron (not an artist).
Capitol Arts Gallery (CAG) is directly across from the county courthouse. It's yellow "eyebrows" also help identify it. There was a sandwich sign on the sidewalk earlier in the day, but as you can see, they normally go incognito. CAG represents over 40 artists.
Both galleries participate in the First Friday art event each month.
There's a natural foods grocery in the center of downtown too.
Over the hill about a mile in East Quincy is Papa's Donuts. I can recommend the Bavarian Cream and Apple Fritters. They also have wifi, albeit password-protected.