The story of my life is I'm too slow for the fast group and too fast for the slow group.
Lately, because of all the running, I've mostly been riding with the slow group.
It depends on my mood and how many other rides I've been getting. Sometimes I'll take off on my own and they'll just have to deal with it. Sometimes one or two others will go off the front with me. If it's a recovery day or I just feel slothful or extra social, I might cruise with them the whole time. If I want a little cardio on those days, I can use the opportunity to work on my spin.
Can you ride once a week with your slow group, and your other rides with other people?
Speed comes from what you put behind you. - Judi Ketteler