Fatburger Groupon: $21 for $10

There is a Groupon available today for $21 at Fatburger for only $10!
Detials:

• Expires Jul 31, 2011
• It appears that this deal is nationwide so click on your city to get your specific groupon.
  
• Limit 2 per person. Limit 1 per visit. No cash back. Tax not included. Not valid with other offers.
  

Sign up for this deal here!