Communication Is Key - The most important rule of group riding is good communication. Ideally, someone will explain the ride in advance pointing out any safety considerations such as rough roads, high-traffic areas, easily missed turns, etc. If no one seems in charge, ask people about the ride. Don't be shy. Sometimes there's no formal leader and the assumption is made that everyone knows what's going on simply because they've come out for the ride. This is sure to cause problems that could result in a crash. If you don't know, ask, and keep asking until you find someone who can tell you what's going on. There are always a few people who know and are willing to help and it can make a big difference in how much you enjoy the ride and how safe it is.