Where can you play football in Freiburg?

I’m looking for places where I can play football regularly. It doesn’t have to be a formal team — even just casual games in a park would be great.

I might not be young enough anymore for highly competitive football, but I still really enjoy playing. So I’m trying to find people to play with in the evenings.

If you know any local clubs that are looking for players and don’t charge high membership fees, that would be a big plus.

Sorry if this isn’t the right place to ask.