Bodi is a 21-and-over club. Bieber is 19.
The club has been cited for knowingly having an underage person in the business.
If the club is found liable, it could be fined $1,000.
Bieber was in Chicago for a concert.
Tuesday, he stirred up Blackhawks fans when a picture was released of him standing on the team logo in the locker room while taking a picture of the Stanley Cup.