well there isn't a spinning guild in philly. there is the handweavers guild and they have spinning (classes as well as a monthly spin in night) as well as dyeing fibers etc. Marfa contacted them and then contacted me and we both joined together. Many of them spin to weave, but plenty more of them spin to knit. So that is how I've joined.
As long as they have a spinning night. I always thought it was a neat idea for all fiber arts to happen together but most places i've been to have them separately. I shall let Ashwin know. I'll keep Mannings in mind too!