It is probably only an option if you live near a bigger city, but my D tried pretty much every sport you can name (not kidding) before finding fencing in her sophomore year of high school. It is fun, lots of smart kids there that she has gotten to know, and very low pressure (which is quite surprising, as her coach has ended up as one of the US Olmpic team coaches this year!). And there is the cool factor of "sword fighting".
Yoga class is another option. We have also done some trail running with our dog (more fun than other running, IMHO). I have also been toying myself with trying to go hiking in every state park in our state; that might make a great family project for a family with younger kids, although only for summer. But you could snowshoe or cross country ski in them during the winter if you get snow.
