If your recollection of grocery store cakes is that they are stale, dry desserts adorned with synthetic "whipped topping", you need to come taste a Draeger's cake. The raspberry almond cake is moist, perfectly sweet, topped with a decadent gooey raspberry sauce. Chocolate cakes are also moist and dense with rich cream cheese frosting- in fact I have never had a stale treat from this bakery.
In addition to cakes, you can also get espresso and sit at the little cafe tables. It is a surprisingly little-known cafe, and therefore not too crowded.