Equinox, Chicago's favorite gym, is giving away free one-month memberships—but they're gonna make you earn it. Every Thursday night through July 28, head to North Avenue Beach for a volleyball challenge with a boss prize for the winner. Volleyball enthusiasts (and the volley-curious) will be able to challenge the Equinox Beach Volleyball team in games from 5 p.m. to 8:30 p.m., and if the challenging team wins, Equinox gives the winners a free one-month membership! Sign up at the Equinox Challenge Volleyball Court located on North Avenue Beach. Walk-ups are welcome, so feel free to pick up a ringer on the beach. We love a challenge!