I do go on some group rides with my local informal "club," but they're always casual, no-drop rides. No pace lines, just a bunch of people sharing the enjoyment of riding bikes together. The weekly rides on Thursday nights are just tooling around town, usually around 13-14 miles or so, but then sometimes on weekends we'll meet up for a nice long ride to interesting places. Most of the time I ride solo, but it's always fun to join a group.