The Chocolate Crackers will play Sept. 15 for the final Friday Night Live of the season, hosted by Main Street Mason City.
Part of The Great River City Festival, the event will be 6 to 10 p.m. around Central Park downtown.
There will be food, beverages, inflatables and games for the kids, a craft show - and maybe a guest appearances by "gangsters."
Admission is free for the family-friendly event. People are encouraged to bring lawn chairs.