Put some swing into your seafood consumption at the Potomac Jazz and Seafood Festival. Relax riverside on the lawn of St. Clement’s Island Museum as Southern Maryland seafood delicacies from crabs to rockfish are served with a side of dynamic jazz. noon-9pm at St. Clement’s Island Museum, 38370 Point Breeze Rd., Colton’s Point. $60: 301-769-2222; www.co.saint-marys.md.us.