>> The keepers of traditional New Orleans jazz, The Preservation Hall Jazz Band (pictured), whose members range in age from 31 to 88, visit The Lincoln Theater tonight. Tickets to the 7:30 p.m. show are $30. >> For those who prefer to look to the future instead of the past, fusion violinist Jean-Luc Ponty comes to The Birchmere to perform his unique blend of jazz, rock, and world music. The show begins at 7:30 p.m….