Beaches & Cream... that could be an entire BOOK practically by itself... but, let me see what I can do to help give you information about the place...
B&C is an old fashioned ice cream & soda shop, fairly small (think it's 3 or 4 booths, plus maybe another 3-6 small round tables, plus a lunch counter). They do NOT take ADRs, are very small, & VERY popular (in my opinion, they serve the best burgers on WDW property).
Their burgers are TERRIFIC, their milkshakes are WONDERFUL, & their chicken soup will cure WHATEVER ails you. B&C is one place that I don't skip, for ANY reason, on a trip to WDW.
I tend to recommend going for an early lunch, instead of for dinner, simply because there's less of a wait. Tend to go right around their opening time (11am) because of the low wait time & by then, I can be VERY hungry
For ice cream, the No Way Jose is very good, or if you want the monster, go for the Kitchen Sink. NWJ is big, KS is HUGE, but they're worth every calorie (you can gain 5 lbs LOOKING at them... search & you'll see pictures on here of them both, to judge for yourself).
My vote? Definitely go, Definitely Enjoy, & Definitely take a moment & see if you see Art, the Greeter at the Beach Club (or as my wife & I think of him, the Grand Admiral of the Beach Club). He's a Disney treasure all himself.
Enjoy the Magic!