tilted kiltWhile casual dining has suffered for the past few years, "breastaurant" chains are springing up across the country.

The original chain, Hooters, has reached $1 billion in annual sales, according to Entrepreneur.

Tilted Kilt was founded in 2003 and expects to have 80 restaurants by the end of year. Bone Daddy's House of Smoke, Twin Peaks and Brick House Tavern + Tap are a few of the other players to have entered the game.

The success of "breastaurants" holds a simple lesson for small businesses anywhere. Although you don't have to wear a swimsuit to work, you do have to offer something special.