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1212 18th Street NW; 202.466.3922

A new cocktail bar-within-a-bar, Addendum, has opened inside the studio bar at Eighteenth Street Lounge. The 18-seat spot primarily focuses on cocktails made with amaro, bitters, and fortified wines. Appealing to "cocktail purists," all the cocktails are made sans sodas, syrups, and citrus. Addendum is open Thursdays through Saturdays starting at 7:00pm.