Yachtsman doesn't serve breakfast but Captain's Grille does!

You can go off the menu or they have a buffet -- including a press-pot of REAL coffee.

Some of the other quicker options are Boardwalk Joe's (on the Boardwalk), BC Marketplace (not sure if it's still Nescafe) and the Java Bar inside the Swan.
ETA: Swan & Dolphin serve Starbucks. Also, the in-room coffee was quite good now that they've changed over to Joffrey's -- I might actually stop taking our Via coffee packets.