I run the sportbike group on meetup and would love to start a women's sportbike group also... How many women riders are there in the Butler/Pittsburgh area? Send me an email and let's get this started before riding season!
Most of the Pittsburgh riders don't frequent over here. I'd recommend searching for Pittsburgh Motorcycle Forums and trying any of the 3 or 4 that are around. Off the top of my head, I know there is bikerplanet and steelcityriders, but I am sure there are others.