We are 30-somethings in SW PA.
I've never really "looked for" relationships/friendships - they just seem to happen to me. So I'm no good on the "how do you find someone" type of questions. But would be happy to discuss poly (or PA...or anything).
I, personally, have never been one to have lots of casual friends/acquaintances either. As an introvert I find that social interactions with people that AREN'T partners or close friends to be emotionally draining. Interestingly, this doesn't apply to posting/interacting in the forums...where I can get my thoughts all organized and typed up