Since Biker Chicks attracts riders of all levels, you must read the ride post carefully on the WCCC ride page for mph average and be able to do the average
Saturday rides for now will be 11-12.5 mph average. Get a bike speedometer and see if you can do this speed.
Tues and Thurs eve rides will be this speed unless posted as a NEWBIE ride.
There will be plenty of newbie rides posted. I have posted newbie rides and have had rides where NO newbies came. If you want to ride and need to practice, you have to come to NEWBIE rides.