I don't think our club actually advertises any rides as "no drop." We'll have a sweep rider who is usually accompanied by a friend or two. We'll have designated re-group spots and a rest stop or two. The faster folks usually go off ahead with fewer regroups. We normally break up into several groups based on desired speed and distance. Riders can and will move from one group to another, it's very casual. We rarely have people show up who are totally off the pace. When that has happened, they generally are apologetic and ask to be shown the quickest route back or an alternate they can ride by themselves. A RWGPS route is usually provided ahead of time.