What’s the most “North Brooklyn” thing about Swallow Cafe? Perhaps the cash-only policy? Or the exposed Edison bulbs. Or the muraled exterior or the exposed brick or the wood furnishings or the old-fashioned chairs or the artsy customers with handlebar mustaches and charcoal sketch kits. It doesn’t really matter. The point is, Swallow Cafe fits right in off the Morgan L stop, and if you’re OK with handling paper money, it warrants a visit.