Jeffrey,
OC is becoming more and more of a year round resort area. Many locations, restaurants, activities, nightlife, etc. will still be open during your visit.
A few favorite restaurants to try, Greene Turtle, Bull on the Beach, Blue Ox, Buxy's Salty Dog, etc. The Clarion (Horizon's) plays some great live music all year - definitely worthwhile to check this location out.
A few other suggestions, an after dinner cruise. Try the Angler or Judith M at Fishtales. Delmarva Bike Week will be happening during your visit, so definitely check out the local papers for all the special events happening.
In addition, don't miss the Gem, Jewelry and Mineral Show at the Convention Center on September 16th. It's a great opportunity to see local artists showcase their jewelry exhibits.
Have a great time and you picked a great time to visit OC!
Anna G.
Answered: March 15, 2011