What is loona chicago?

As an AI language model, my training dataset is only up to September 2021, therefore I do not have any recent information about Loona Chicago. However, Loona is a South Korean girl group formed by Blockberry Creative. The group consists of 12 members representing different countries and cultures, and they are known for their unique concepts and music style. Chicago is one of the largest cities in the United States, and a popular destination for K-pop groups to perform. It is possible that Loona had a concert or fan meeting in Chicago, but I would need more specific information to provide further details.