Mozza2Go's offer of 30% off the bill brought the biggest response yet, with 2,699 people requesting pass codes and nearly 500 takeout orders placed, which, since they say each order represents parties of two or three people, adds up to about1,000 to 1,500 meals.

"These are people who read food blogs and care about restaurant news," says Foundry chef and owner Eric Greenspan, adding that the promotion prompted people to be more adventurous with their orders. It also spurred people to order more, he said, which pushed the check average up and offset the discount.

"I believe the song goes, ‘It's hard out there for a foodie,' " jokes Greenspan, pointing out that many subscribers are people who would eat out more often if it weren't for the recession.

One such foodie is subscriber Jiwon Lee, 30, who works in marketing and blogs at foodisluv.blogspot.com. Lee says she appreciates the service because Nemser carefully curates which restaurants she uses on the site. "I know the deals that come in will not be a waste of my time," Lee says.

Associating BlackboardEats with hot new restaurants and respected older ones was a calculated move on Nemser's part. Restaurateurs "want to play in the sandbox with like-minded restaurants," she says. "If you begin featuring restaurants that aren't as strong in food, you ruin the brand."

To keep the brand high-end, Nemser has paid close attention to packaging her offers. When a promotion is sent out to subscribers, it comes with an attractive picture of the restaurant alongside a write-up composed by a stable of respected food writers, including former Food & Wine magazine editor Dani Fisher.

Helen Sillett, an editor of the 2009 and 2010 editions of the L.A. Zagat Guide, edits the L.A. edition of BlackboardEats; and Bill Sertl, who worked as a travel editor at Gourmet for 10 years, edits in New York. Right now the site generates income only from advertising, though it may begin charging a nominal subscription fee down the line.

So far, the boutique approach is working.

Lee says that every time she has used a promotion (she uses about 70% of those she signs up for), people around her have also been using the pass code. "It's something you're proud of, a network you know about," she said. "All the foodies go to the same restaurant at the same time."

Which, say a number of restaurateurs who have used the service, is both its upside and downside. The service, Greenspan says, "serves as a promoter, and once you're not being promoted the subscribers are going to the next place that is."

Amir Ohebsion, owner of Fraiche, concurs. "I don't think there's much repeat business from the people who use it," he says. "But I think it's a great way to launch something new." Ohebsion says that he'd like to use it to help promote Fraiche's new weekend brunch as well as the opening of its new lounge toward the end of this month.

And, in the end, Nemser says, BlackboardEats is not as much about repeat business as it is about the buzz that positive of word-of-mouth generates.

"I haven't been back to any of the restaurants," says subscriber Daryl Conui, 25, who works in advertising, describes himself as a foodie-in-training and runs with a group of food lovers. "I'm interested in variety and I'm looking for new places, but I recommend these restaurants to everyone."

jessica.gelt@latimes.com