Well-appointed, informal and lightly exotic, rue Keller wine bar Aux Deux Cygnes is the answer for any casual diner looking to drink natural wine and snack on something other than the usual cheese plates and charcuterie. French-Vietnamese owner To Xuân Cuny shuttles between service and the kitchen, where she turns out a tasty array of sandwiches and small plates influenced by both her Vietnamese heritage and her experience in the Michelin-starred restaurant world. The latter means Aux Deux Cygnes is among the cleanest and most hospitable of Paris wine bars. The former finds expression in a tasty banh-mi, as well as some delicately piquant mackerel rillettes that arrive beneath a bright heap of cilantro. The natural wine selection perched amid the bar’s pretty triangular shelving is nicely curated to emphasize atypical grape varieties and marginal regions. If the overall experience at Aux Deux Cygnes can veer towards the dainty at times, it still makes for a welcome change from the mélée of beards and egos one encounters in many more traditional Paris natural wine bars.