South Street Diner hosts its annual “South Street Diner Customer Appreciation Day” on Sunday, September 17, from 2– 6 p.m. Enjoy the fun-filled afternoon with free pony rides, face painters, cartoonists, an ice cream truck and a live DJ playing family-friendly hits all between Kneeland Street and Beach Street. Owner Sol Sidell will be present to meet and greet loyal South Street Diner customers and serve up free hamburgers, hotdogs and refreshments for all ages.