I was in Mannheim for work for a while. I met a few folks and groups but mostly in the baden/Rhineland areas. Mofafreunden obergrombach I talked to mostly, they were by Karlsruhe which was a long scooter ride but I did rent a scooter for like 15 euro/day and rode down there.
Uber groms. heh. bach
and something monkeys and a couple fellas with Simson Schwalbe's with a skateshop outta Nuremburg