coffee grinding!

Hi..bit of a strange question. I'm wondering where I could bring some coffee beans to get them ground? They were a present, not a large amount, and I don't have a coffee grinder at home and won't be needing one so it's pretty much a one-off! Thinking of going to ask at a nice coffee-shop (and having a coffee there to say thanks!) but if there's an easier option, I'd love to hear it!

Thanks for any ideas!