One of those rare rides where I felt more stressed afterwards. On a night where the temperature was such that rider safety should have been a primary concern, there seemed to be very little. For a group of 20, 4 traffic light splits is too much. 2 were caused by quick lights, but the other 2 were created by being overly aggressive when approaching green lights that timed out. It seemed the further the ride went, the less concern there was for an "all on" call from the back. I lost count of the number of "gap" calls on Lebanon that were only momentarily addressed before the pace picked back up without an "all on" call. Add to Lebanon the need to single up to pass riders, then needing to single up to be passed by riders, only to have some of those riders fall off their group necessitating a single up that was abandoned as the riders joined our group - all within the span of a few miles. The ride finished with the group stopped at Legacy and Main. As a car approached, it was waived around by the riders at the back and announced to the group. The group entered the intersection as the car was attempting to drive around but none of the riders would give way and forced their way into the left lane, blocking the car in its turn. Only 4 of us waited for the car to come around the group on the right, and of course we were left to our own on Main as the main group accelerated to their normal pace without an "all on" call. Group ride chaos at its best/worst.