219135 Hmm, have the CMC tried making coffee to get their cutie marks? Or... maybe... oh I know. Rumble could be a recurring character, showing up almost every morning to pick up coffee for ThunderLane (who could work the night shift of the weather patrol). Rumble could be used as a source of advice... i guess,,, hmm, it is rather hard isn't it... maybe dinky could hang around at the shop in the afternoon while derpy is doing her mail route... beyond those ideas i am also stumped.

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Of course I do! I have a little story I'm putting together for Christmas. I'm still not sure if I'll post that one here, though. It'll have spoilers for the series.
That's a nice idea, but I feel my story won't be as original as I'd like it to be if I did that. Besides, the Mane Six are a lot older than these two. The only ones I could use for secondary characters are the CMC and the other foals, and I'm not quite sure how I'd use them.

So tell me, do you plan to write a sequel to The Coffee Shop Duo? If you do then I suggest including at least on non OC as a secondary character, that way it will be easier for people to find your story if they search it.