I found an interesting site the other day, GoOut2Eat which has discounts for DC area restaurants. They just started posting ones for Bethesda, MD. They have some quick, lunch type places (such as Crossfire, Philadelphia Mike's, and St. Elmo Deli) as well as sit down nice restaurants (such as Jaleo, Gaffneys, and Thimian Thai). I tried out a coupon for Philadelphia Mike's yesterday, a dollar off a combo.
They also have discounts for a lot of resturants in Rockville.
[where: Bethesda, MD]
[where: Rockville, MD]