Smashburger: $12 Voucher for $6 Today!

Groupon is offering a $12 voucher to Smashburger for $6 while supplies last. It is available for those in the following areas:

• Boise
  Chicago
  Cincinnati
  Colorado Springs
  Dayton
  Denver
  Fort Worth
  Houston
  Kalamazoo
  Las Vegas
  Lexington
  Minneapolis/St. Paul
  Reno
  Sacramento
  Salt Lake City
  Shreveport
  Tulsa