In the city I live in, we have a state-sponsored walking/biking/running trails and parks system that is maintained appropriately. It is a nice place to bike, walk/run with family and friends getting exercise, socialization, and connecting with nature.
Additionally, you can grill food at grilling stations at local parks and host parties or gatherings with your family and friends while listening to music, having fun, and enjoying fresh air and sunshine.
I am also fortunate to live by a Great Lake, so doing the same activities stated above along paths and at the beachfront makes exercise more fun because you are in a beautiful place surrounded by your favorite folks.