The youth club is a meeting place for teenagers and young people. They can meet there, exchange ideas or play games. Job application training and advice are also offered.

The Kostheim youth club "Die Wohnung" at Flörsheimer Straße 50 in Mainz-Kostheim opened its doors to visitors in March 2019. In June 2020, it moved to "Die Eisdiele" in Hauptstraße 136. The team from the Reduit children's, youth and district center is responsible for the Kostheim youth club.