Thanks for your replies, Bald Paul and autonomy.
First the heat maps. I don't find them too useful in areas that are not very well frequented by cyclists. Around Windham, it shows 111A and 108 as most frequented. But I have been on those roads. And they are not very enjoyable mainly due to heavy traffic.
About cycling clubs, GSW looks like a great option to explore. It's just that I am loath to put my bike in a car and drive to a start location. I could ride to start location if it is nearby and I have the time to spare. Will explore GSW for that option.