The annual
DogsWalk Against Cancer in Riverside Park, NYC, is a great, fun-filled day for you and your dog.
I've been going for three years now and my Gem and I always have a great time. You get free food samples and other goodies, there are contests (such as best dressed, waggiest tail, etc), adoption sites, agility courses... it's just all around fun, and your money goes to finding a cure for cancer!
I suggest everyone in this area go!