Camp 4 Coffee
Camp 4 is a much loved CB institution for its espresso, baked goods, and breakfast burritos. There are three locations, but the spot on Fourth Street, with it’s license plate décor and tiny patio, is by far the most charming.
http://www.camp4coffee.com/

Izzys
If you want something slightly more substantial, check out Izzys, located a block off Elk Ave. It’s tiny (there are only about four tables) but the food is delicious, local and hearty without being heavy, so it won’t weigh you down on the hill. Try the breakfast latkes.