Bike Ride to Nowhere
Grab bikes and pick a direction with zero plan. The only rule: every ten minutes, one person calls out left or right and you follow it blindly.
Keep riding until you find something interesting—a weird store, a hidden park, a mural, a view. Stop and explore for a bit before moving on.
Eventually loop back home or stop somewhere for food or drinks. Try to retrace your route on a map later and see how far you wandered.