Larger parks often have special events that anyone can attend for free on the weekends events. Some of the more common events are theater or music in the park.
A day in the park can be a wonderful way to spend an afternoon on a date. In addition to listening to the music or watching the play, you can relax, people watch and enjoy the afternoon sun. You can also take along a Frisbee or paddle ball to extend the fun.
To get a complete list of all the organized events that will be taking place in your local parks, take a trip to your local parks and recreation department where you should be able to obtain a calendar of upcoming events.