Opened in 2012, Baustelle 4 U (formerly "Zille") is a popular gay bar run by a very friendly German guy and his team who'll make you feel right at home. Located in the heart of Old Town, the venue is especially lively in the evenings and at night, with singing, swaying, and dancing. On weekends and during Cologne's major events like Carnival and CSD, the party always reaches new heights at Baustelle 4U.