If you're looking for just a space to rent you can check the rec centers / athletic clubs they're pretty affordable
We did the upstairs at Lucky Lab in Multnomah village and it's very reasonable. Dig PDX sounded pretty reasonable too
THPRD has good prices if you want indoors, and just outside at a park is nice.
If you're looking for just a space to rent you can check the rec centers / athletic clubs they're pretty affordable