Rewards Network offers up to 20% cash back when you eat in member restaurants. It even has a FF point option. Usually it costs $49 upfront to joint. However, join online and $49 taken from earned rewards so no upfront dollars needed. FAQ said

Enroll today and start saving tonight!

When you enroll online with Rewards Network, you're given the option of registering for Cashback Rewards savings or airline miles in the frequent flyer programs of eight major airlines. To earn Cashback Rewards savings, the membership fee is $49, but, when you enroll online you'll pay nothing upfront. Instead, we will apply your first $49 in savings to the annual fee. After that, your savings will automatically be awarded to whatever registered credit or debit card you use to pay the bill at participating restaurants, hotels, shops or service providers.

Looks like a no lose proposition. Go to http://www.rewardsnetwork.com to sign up.

BTW, I am not affiliated with, nor do I get anything from, Rewards network if you sign. The URL is the general one for its site with no affiliate identifiers.