Like Thriller dance routines, running is best performed when you're being chased by a group of zombies. Frolic among fellow runners with today's Groupon: for $20, you get a one-year membership to Chicago Area Runners Association (up to a $44 value). Chicago Area Runners Association (CARA) offers a discounted membership to seniors (a $25 value) and youth (a $15 value).

Founded in 1978, CARA is the third-largest nonprofit running organization in the nation, and is dedicated to supporting and celebrating Chicagoland runners. Pavement pushers of all abilities can take advantage of membership perks that include discounts on gear from local stores, discounted race-entry fees, access to CARA's race-day tents and gear checks, and a one-year subscription to Runner's World (a $16.99 value; not included in a youth membership).

Aspiring marathoners can also get a discount to train with an 18-week program designed by running legend Hal Higdon, just one of CARA's many training programs. Or weekend warriors can bond with likeminded bipeds during leisurely fun runs around their neighborhood or along the scenic lakeshore. Check CARA's calendar for running-related seminars, race dates, and screenings of inspirational films such as Ride the Divide, and Born to Run: Bruce Springsteen Live in Concert.