A little shot of “Stress” is sweet, according to Johnny’s Hideaway bar manager and longtime employee Nancy Tardo. “Stress” is Tardo’s signature shot, a little something she first tasted back in 1992 at a Buckhead bar called Grand Stands. Flash forward. Now, many Johnny’s regulars only drink “Stress” ($9). All of the bartenders at the Buckhead nightspot know how to blend this mix of vodka and coconut rum with cranberry and pineapple splashes, to pour in a shot glass or over ice, when guests want a little something sweet.