Beaches & Cream doesn't take ADRs (it is VERY small, but very delicious anyway). They are on the dining plan, BUT, of all of the choices of restaurants you can use that TS credit on, B&C would be one of the "worst" choices; it's much more sensible to pay out of pocket (OOP) unless you've got a spare TS credit that you just can't find a "better" way to spend it. That's only because B&C prices are so "reasonable" compared to most other TS credit restaurants.
Enjoy the Magic, & be sure to stop by the Beach Club lobby & say Hi to Art, the Greeter (or as he's known to my wife & myself, the Grand Admiral of the Beach Club). You won't regret it!