I don't know the answer to your question but I would say that what seems to be the biggest hurdle for many who join my women's group ride (a no drop ride of about 35 miles) is not the distance, but rather the speed. Most people who think about joining a club have probably already ridden enough to be able to hang in for the mileage. However, the speed they've ridden their mileage at makes all the difference when trying to keep up with a group. My group rides purely for fun, most of us-if not all-are out just for the comraderie and exercise, not to "train", but we do avg 16-18 mph--and sometimes faster depending on how the group is feeling. We'd never leave someone behind, but I know new people are often frustrated trying to keep up when they are used to slower going-- or for that matter trying to slow down when they are used to going faster (darn racers ) So, make sure you check out what the group speed will be as well, not just the distance- and train for both--or find a group that meets what you are already doing...good luck, I love my club--without them I'd have given up riding a long time ago. It's a great bunch of women and I hope you find a group that is just as welcoming and fun as the one I have found!! Ride On,

Kristin