The GMK Bi-Club in Brühl, near Cologne, is a unique bisexual swinger club open daily from 12:00. It welcomes everyone regardless of sexual orientation — women, men, couples, cross-dressers, transvestites, and transsexuals. The club features multiple rooms for erotic fantasies, a cozy contact bar with free soft drinks, and comfortable lounge seating. Free condoms, towels, and flip-flops are provided. There is no dress code. Regular themed events include trans parties, gangbang nights, nylon parties, and men-surplus evenings on Fridays and Saturdays. The venue covers 400 m² and includes a BDSM area, darkroom, cinema/video room, and couples area. Smoking is permitted in the outdoor area.