I love to spend about 4 or 5 hours every weekend golfing with some buddies. We actually all just went on a trip to Michigan to for a small golf tournament with 10 of us. It's great to get outside and enjoy the weather, especially in the spring and fall.
If we are counting mowing lawns, I had about 5 or 6 lawns I would mow during the summers in middle school. I also worked in high school during the summers counting inventory at a warehouse where it could get hot during the summer.