I started riding with a group on Saturdays. They mostly take one route, but it's a route I wouldn't have thought of, and now I use that as my daily route. So in your case, I would just follow the cue sheet even if it took a few stops. After you do the route two or three times, you'll likely have it memorized for the future. If the route's worthwhile, I wouldn't worry so much about the group; just ride when you want to. Or find a slower group.
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"be careful this rando stuff is addictive and dan's the 'pusher'."