Unlike sharing toothbrushes, boyfriends, or a single roller skate, sharing the same car has been known to bring people closer together. Partake in communal cruising with today's Groupon: for $30, you get a one-year standard membership (a $75 value for new members) and $30 worth of driving credit to I-Go Car Sharing.

Dedicated to the environmentally friendly transportation of urban denizens, I-Go Car Sharing's traffic tamers send carless Chicago excursionists from Point A to Point B in one of the ready-and-waiting roadsters. Inductees into I-Go's vehicular brotherhood reap roaming rewards with a one-year standard membership, gaining access to I-Go's eco-friendly fleet, which includes earth-minded autos such as the Toyota Prius, the Honda Civic Hybrid, and the Oldsmobile Pogo Stick. After utilizing the online scheduling system and deciding on a short jaunt (starting at $6.75 per hour plus $.40 per mile) or an all-day adventure (starting at $65), wayfarers brandish their provided smartcard to unlock one of I-Go's multitudinous mobiles stationed in more than 35 Chicago neighborhoods. Ramblers can run errands in Evanston or stage Dukes of Hazzard reenactments in Hyde Park before returning their carefree carriage to its parking-space domicile.

After initiating the one-year membership, drivers can schedule an inaugural spin using their $30 driving credit. In addition to reservation and vehicle cost, I-Go's hourly and daily rates include gas, insurance, and watchful 24-hour assistance from the company's stable of sentient tow trucks.