Restaurant.com is offering 80% off gift certificates for Memorial Day weekend!
Just find your restaurants, select your gift certificates, and enter the code "SPECIAL" at checkout! That translates to $25 gift certificates for $2 each!!
Be sure to read the fine print, most restaurants place some restrictions on when/how you can use the GC's, but it's a great way to get a cheap night out - also great for Father's Day gifts!