Fubar
Guru
Yeah, if you're not interested in riding hard or testing yourself it is incredibly tedious... or if people are doing strict rides at a certain time/distance/effort for pure training it isn't much fun.
I really love it when you get a line of riders, start off slow, after each lap the front rider moves to the back, until everyone has had a turn at the front and then the pack starts accelerating. If you can't get back onto the back of the pack after a stint at the front you can drop off and do your own thing, and the rest of the pack keeps getting faster and faster, shelling people out the back as they do so, until it ends up in a 1v1 or everyone else gets dropped.
Otherwise known as a CHAIN GANG!