TGI Fridays offers endless appetizers for $10

It's thought to be a first for a national chain, but there's a

(Screengrab/TGI Fridays)

TGI Fridays is raising eyebrows with its latest promotion -- endless appetizers for just $10.

It's thought to be a first for a national restaurant chain.

But there's one big catch.

You can only get refills of the same appetizer, such as potato skins, mozzarella sticks or the Tuscan Spinach Dip.

Still, it sounds like a great deal for sharing among a large group.

But while Fridays says it discourages sharing apps, officials concede the guideline won't be enforced.

"At the end of the day, our servers aren't policemen," Fridays' Chief Marketing Officer Brian Gies told USA Today. "We're not going to slap someone's hand if they reach over and share someone else's mozzarella sticks."

The promo runs through Aug. 24.