1. Spend the night exploring a new part of the city until you find seven new breakfast places you could possibly eat at when dawn comes.
2. Drive to a cliff in the middle of the night so the sun will be rising when you get there. Have a picnic to celebrate the trip and take a morning nap. Naps are great.
3. Pretend to be a newly married couple and go to a "testing" place like a car dealership or a "room display place" and improvise your hearts out.
4. Collect "climbing trees" by going around and seeing who can find the most in thirty minutes. Take photo evidence that they are climbable, photographing each new tree from the top. Loser buys drinks.
5. Farmer's market!