What are some things to do at 8 PM in the summer? (more details in the question)?

If it's warm enough outside and you have a pool, you could go swimming. You could read a good book, go through your closet and drawers to see what clothes you haven't worn for a very long time and donate them, listen to your favorite music, write poems or stories, ask your family to start a game night, go through the Yahoo Answers and see if you can help someone with good advice.