Depends on the fleet. Here on Buzzards Bay, we don't usually have a lack of breeze. This fleet races basic working sails: Main and self tending jib. We have a fleet in Hingham, MA that allows spinnakers and there is always PHRF. Boats can carry genoas, symmetrical and asymmetrical spinnakers.
Hey Capt. Jack, I work for Ballentine's Boat Shop and we build the Stuart Knockabout. If you are around Cape Cod, I would be happy to show you the SK and the shop. If you hurry, we will still have a boat in the water for a while longer. If you wait until winter, this place has a lot of other classics to see. Here is a quick video from our regatta this summer. Cape Taco, coffee time is at 10. Stop by anytime.