Affordable, once or more x weekly adult parkour & freerunning classes in Marin?

[Aaron Irons]

Hi everyone. Can anyone recommend any affordable, consistently scheduled, adult oriented free running & parkour classes in Marin? Ideally held at least once or twice each week.

The only place i found so far is The Cave. But they say even in their website that it is oriented to children. Strange to not have adult focused classes. ( Edit, someone just called me back from there saying Tuesdays 6:30-8:30 class is for adults 18+.) But they only have a very, very small indoor space dedicated to it, last I checked it out about 2 years ago. And are very expensive, around $32 per class, especially considering these factors.

Looking for something more affordable, adult focused and with more training options, so likely outdoors.?