There were refillable mugs in our room when we checked into the YC. We just unwrapped them and started using them right away. We are not coffee drinkers, but I'm guessing you could get coffee the same places we got sodas which were Hurricane Hanna's (by the pool) and Beaches & Cream. I can't remember if they had coffee in the shop down in the lobby, but you might check about that. The mugs said Yacht & Beach Club on them. Hope this helps.
Lisa
Tiger Fan