I hit some tennis today with Rick Ostlund, the wonderful pro at Pine Island Racquet and Fitness in north Duck. It's a great place to get some tennis in when you are down here, especially if you don't know any local tennis players. The club is open year-round.
The club is associated with the Sanderling, but anyone can play there. In the summertime, Rick runs lots of drop-in clinics for intermediate players, beginners and kids. I bring my nieces every summer. The kids clinics are super fun and Rick is a great teacher.
The club is about 3 miles north of the Sanderling on the sound side of the road, across from the Hampton Inn. There is a full gym there too, but the tennis is the draw for me. There are three indoor courts -- a godsend in the summer, and a couple of Har-Tru clay courts outdoors (I have never played on those.) Prices are very reasonable, especially for the clinics. In the summer, there is usually early morning Cardio Tennis a couple of times a week as well.