I have been going to Stella's Coffee for nearly three years now and as a college student it has been the favorite go-to spot to get some work done. On top of being able to utilize their fast Wi-Fi and drink their quality coffee, they offer a wide range of gluten free treat breads from Outrageous Baking.
Last time I was there (yesterday) they were offering Chocolate & Zucchini Bread, Cinnamon Coffee Cake, Lemon Poppy Seed Bread, and Pumpkin Bread. I have tried all of these at least once and they are always extremely moist, tasting more like cake than bread.
As for the coffee shop itself, the environment varies depending on when you go. If you are going at some point on the weekend (particularly on Fridays and Saturdays when they feature live music) it will be more of a loud and social environment. However, if you go on a weekday afternoon or evening the place will be filled with mostly students and business professionals looking for a quiet spot to settle in and get work done.
If you are in the Old South Pearl Street neighborhood of Denver, I highly recommend you stop by Stella's Coffeehaus for a cappuccino and the Gluten Free Chocolate Zucchini Bread.