Clearly, Mayor Bloomberg didn’t make the guest list.

Six years after New York City passed a ban on smoking in bars and restaurants, it is easier than ever to find smokers partying indoors like it’s 1999, or at least 2002. In November, Eater.com called it “the worst kept secret in New York nightlife” that “smoking is now allowed in numerous nightspots, specifically just about any and every lounge and club with a doorman and a rope.” A few weeks later, GuestofaGuest.com, a blog about New York clubs and bars, posted a “smoker’s guide to N.Y.C. nightlife.”

Image VAPOR TRAIL Tracking the scent of cigarettes around Manhattan. Above, at the Libertine. Credit... David X Prutting/PatrickMcMullan.com

“Everyone looks the other way,” said Billy Gray, 25, a reporter for Guest of a Guest, who says that he knows precisely which high-end bars and lounges, most of them in the meatpacking district or Lower East Side, will let him smoke inside. Far from deterring smoking indoors, the ban simply adds an allure to it, said Mr. Gray, a half-pack-a-day smoker.

“It’s more of an illicit thrill now,” he said. “Like when you were a teenager and snuck a beer in your parents’ basement.”

Plenty of New York City bars have thumbed their noses at the smoking ban for as long as it has been the law. As early as 2004, The New York Times wrote about neighborhood bars that allowed friends and regulars to light up after closing time. In 2008, at the opening of the Libertine, a Todd English restaurant in the financial district, cigarette girls handed out free smokes that guests consumed liberally.

But corner bars that tolerate smoking have traditionally relied on flying too far below the radar to be noticed. By contrast, at expensive paparazzi-flanked nightclubs that appear in gossip columns, there seems to be a new brazenness.