The Chicago New Years Eve 5K Coupon Code is “RSVP”. The Promo Code “RSVP” is the Chicago New Years Eve 5K Coupon Code. The Chicago New Years’ Eve 5K Discount Code “RSVP”. The Chicago NYE 5K Registration Code “RSVP”. Registration is available The New Years Eve 5k Chicago Promo Code is “RSVP”. The Nye 5k takes you around the 3.1-mile loop where you will see the scenic Lincoln Park and the Lakefront.