When I was training for a race this winter, I would just let people know MY ride plans - "I'm riding at 10am from X location, pace will be xx mph, and I'm going for 80 miles. Let me know if you can make it." That way, I get in exactly what I need, and if anyone wants to show up, they can.
And then when they get there and they start out doing it your way but then stop every two miles to make an adjustment or get a drink or whatever, you have to be willing to say, "I'll wait for you at the turnaround point." Or, "I'll catch you on the back side".
Else you'll be just like limewave, having your ride co-opted by someone else.
Karen
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insidious ungovernable cardboard