Cafe Petit Marche
Cafe Petit Marche is a small eatery-slash-convenience store (don't expect the food to be French!) run by a rather unfriendly Korean couple that sells bagels, coffee and an assortment of homemade sushi rolls and other reasonably priced lunches for takeout.
Open only on weekdays and catering mainly to the office workers in the vicinity, there are tables and chairs for sitting and eating, but quite frankly, the view is probably better elsewhere.