Running the Chicago Marathon this weekend? You deserve to treat yourself after all that training, and a spa treatment is definitely the way to go. Bring your bib to any Spa @ Equinox (there's a location in the Loop, Lincoln Park and on Michigan Avenue) and you'll get 15% off your service. The deal is good October 14-21. And when you book a treatment, you also get access to the gym all day. You know, just in case you want to hit the treadmill.