The Drink: Sidecar The Location: Open City, 2331 Calvert St. NW, (202) 332-2331 The Price: $7.50 The Buzz: Tryst and the Diner in Adams Morgan function under a shared mantra: Keep it simple. In taking the time to perfect the basics (espresso) and provide the comforts (grilled cheese), this mini restaurant group has acquired a large, devoted fan base. Open City, the group’s newest addition in Woodley Park, seems to be following their lead—-at least as far as cocktails go (which is as far as I got on a recent visit). The list is mostly straightforward classics, including some old-school classics like the rusty nail and sidecar, the latter of which I couldn’t resist. The bartender kept it upscale and used Rémy Martin instead of brandy, then he added triple sec, lemon juice, simple syrup, and, unexpectedly, soda. The drink was heavy on the lemon but not to a fault—-it was refreshing, and the soda kept it light. I wouldn’t have minded a bit more cognac, but it was still delicious, and at $7.50, it took me back in time.