Regular cars envy bumper cars for their low centres of gravity, eco-friendly electric motors, and ability to cathartically head-butt each other without risking concussions. Make sedans and hatchbacks turn green with today's Groupon: for $55, you get 30 minutes of WhirlyBall for up to 10 people at The eZone (a $125 Value).

The eZone entices players of all ages with more than 30,000 square feet of space for energetic group games. The majestic sport of WhirlyBall combines the tenets of bumper cars, hockey, and lacrosse in a brilliant amalgamation that was carelessly overlooked by Mother Nature. WhirlyBallers in the heat of combat must steer their WhirlyBug cars with one hand while simultaneously using a plastic scoop to fling a wiffle ball at an elevated goal. Groups of up to 10 people can zoom around the court for 30 minutes or can use two Groupons for a full hour of fast frenzy. First-time players might be surprised by the intensity and speed of the game, which thuds and whizzes its strapped-in participants on an electronic court. Each car sports a special steering mechanism that enables the driver to steer in any direction, maximizes control, and makes it easier to parallel park in absolute darkness.

Though The eZone can accommodate walk-in customers, it may be productive to call ahead for court reservations during peak times. Feed friends with the facility's full catering menu, which allows minds to focus on the game and away from soufflé ingredients.