Experiential marketing, as the ad industry calls such campaigns, is intended to give people something they can tryout and photograph. Companies are holding such events in cities around the world, but advertisers said Times Square was unparalleled in its reach. People around the world recognize Times Square in photos and videos online and are more likely to view them, marketers said.

Charmin’s bathrooms, which opened on Broadway near West 46th Street on Nov. 20, generated traditional coverage with more than 100 articles published about the fancy toilets. But consumer videos posted on YouTube alone have been viewed more than 7,400 times.

Hundreds of other people each week post photos and videos on their blogs and MySpace pages. One blog post last week, “Der New York Trip Part II”, written in German, shows a young couple posing with the Charmin bear. Charmin is a brand of Procter & Gamble.

Another post about the Charmin toilets last week on a Web design blog wondered, “Could this be too much marketing?” Christian Montoya, the site’s author, videotaped the bathrooms when he visited Times Square on Thanksgiving so that he could post the footage online for his roughly 700 daily readers. Though Mr. Montoya, a senior at Cornell University, said he was skeptical of marketing but thought the Charmin bathrooms were effective.

“It was more than a billboard because you could actually try the product,” Mr. Montoya said.

It is difficult to count exactly how many people pass through Times Square each day, but foot traffic by some measures has nearly doubled. In 1997, the Times Square Business Improvement District counted 8,702 people an hour passing through the most crowded parts of Times Square during the busiest times of year. This year, the Times Square Alliance found that nearly double that amount — about 15,000 people — passed the Virgin Megastore on Broadway during busy hours.

But, advocates of experiential marketing say headcounts in Times Square underestimate the district’s impact. Face-to-face interaction with customers is more powerful than traditional ads, they say.

“What people do is geometrically more powerful than what they are told,” said Brian Collins, chief creative officer of Ogilvy and Mather Brand Innovation Group, a part of the WPP Group. “Feeling something, picking it up in your hands, walking into an environment is a far more powerful brand promise than anything you are simply told through traditional media alone.”