Martinis & Music.  The fourth and final installment of this year’s event will celebrate important members of the Marietta community. Exhibitions, sponsors and volunteers will be the focus. A live band will provide entertainment. There will also be hors d’oeuvres and a cash bar. 5:30-8:30pm. Marietta/Cobb Museum of Art, 30 Atlanta St, Marietta. More info: 770-528-1444.