Grossstadtsurfer
Founded in 2000, Grossstadtsurfer is an association of Munich surfers, representing the interests of river surfers and promoting acceptance of the sport. While their website and facebook page used to be a platform for communication and a goldmine of information, there seems to be no recent activity.
Website: grossstadtsurfer.de
Facebook: facebook.com/pages/Grossstadtsurfer-eV/233444897672