Sidetrack Chicago, located in the Windy City's Boystown, continued its annual New Year's Day tradition of throwing a "1/1/Onesie Party." Hundreds donned their comfy, sexy, or silly onesies to start the new year in comfort. Prizes included Best Group and Sexiest Onesie. Chicago might be cold on New Year's Eve, but New Year's Day was hot! Don't miss next year's 1/1/Onesie party on 1/1/21. Check out photographs from Jed Dulanas on the following slideshow. Learn more at SidetrackChicago.com.