(Crain’s) — Every weekend, Jenna Corman Mandel tries at least two different restaurants. Her appetite for new discoveries is insatiable, as is her taste for discounts. In fact, the 27-year-old communications executive for a nonprofit has become an avid user of promotional services, which offer as much as 90% off restaurant tabs. “I’m definitely addicted to these deals,” Ms. Mandel says. Meet the new breed of diners. They are hungry for bargains and are unlikely to go where they can’t get them. They are helping feed a cottage industry of companies that offer access to cheap eats. No fewer than 15 websites providing deep discounts have been launched over the past couple of years, including Groupon, VillageVines and BlackboardEats. OpenTable, the 12-year-old online reservation company, began offering deals in August.