Coupon sites are the new Yelp. Actually Yelp is so yesterday when it comes to coupons.
You sign up for free and then you pay about $10 to make a dinner reservation to a specific restaurant through the site.
Then when you show up, your waiter or waitress knows to make a major deduction on your bill at the end of the night, sometimes as much as 30 percent.
Think of it as the Priceline for restaurants with restaurants selling empty tables at a discount.