OK, just a reminder. The weather looks like it will be great.
This is a social, no drop ride. If you are just beginning and have not done group riding before, the "slower" group would be perfect. Both of the groups are no drop, same route, with a stop at Great Brook Farm in Carlisle. You can start with the faster group (average 14-15) and if that is too much, you can just pull over and wait for the second group to go by and join them.
PM me if you want more information.