Possible Clues:

• CINN-A-STACK seller
• Business built on stacks
• Restaurant with a 'Simple & Fit' menu
• Restaurant chain with syrup dispensers on every table
• Pancake restaurant, abbr
• Chain selling stacks
• Place to order a stack, say
• Chain with sausage links
• Flapjack eatery, briefly
• Sister co. of Applebee's