A person jumps into Lake Michigan at Montrose Harbor during the tenth week of Friday Morning Swim Club on Friday, Aug. 4, 2023 in Chicago, Ill. The club started in 2021 as eight friends meeting up at Montrose Harbor every Friday morning to swim and catch up before the weekend. That summer, the club grew to around 700 people through word of mouth, and today, over 3,000 people flock to the harbor to swim each Friday morning.