Whether it's Mad Men mania or just the cyclical nature of mixology, the old-school cocktail is experiencing a revival in NYC—and at no drinking den is New York's Sidecar- and Manhattan-sipping craze more apparent than the Flatiron Lounge. Everything about this seven-year-old watering hole conjures a bygone era in the City's history of nocturnal revelry, from the ambient jazz music playing overhead to the restored 30-foot-long mahogany bar—constructed in 1927 and imported from a favorite haunt of Frank Sinatra's—and the sumptuous art deco–inspired interior. But the real focus here is on the perfectly mixed libations themselves, which include classic beverages from distinguished NYC institutions (such as '21' Club's Southside Royale) as well as innovative infusions from New York cocktail maven Julie Reiner. If you're having trouble picking your poison from the extensive drink list, just tell the expert bartenders your liquid preferences, and let them take care of the rest.
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