a.bar, which has a very limited food menu (but includes oysters and pickles) and extensive booze menu, is located on Rittenhouse Square, two doors down from a.kitchen, which is a full-service restaurant. Both are extremely well-run, with excellent staff both in the kitchen and the dining room.
The cocktails at each restaurant are as good as you'll need. The food at both restaurants is always excellent. Indeed this visit, the oysters at a.bar were so good that all other oysters consumed over the next few days paled in comparison. The burger at a.kitchen, well, it was perhaps in the top 5 burgers that I've ever eaten.