At all CL, cheese trays are offered every day, witha varying selection of cheeses and starches. (i.e. crackers) Otherwise I agree with the other posters, menus rotate/repeat on a weekly basis. Sometimes if an item runs our early they will substitute another item- like if a dumpling runs out they will replenish it with a different kind of dumpling. It also seems to me some cheeses change day to day, while others get repeated more often- like cheddar is pretty popular. And at most club levels the veggies offered alongside the dips stay the same.
So It's hardto say which category brie might fall into. If it's a cheese, you may get lucky and see it more than once. If it's a 'hot' item, it may only be offered once a week. If it was a replacement item, it may not happen at all. (though that's least likely)
It is also true that many - though not all - of the items offered on club level are also offered at another restaurant in the same hotel (in that sense, BC and YC are considered one hotel). If it's brie you seek, you might find it offered at one of the restaurants. Try emailing the IPO to see when/where brie is offered.
As for beer- I've not stayed at YC, but at BC- I think the beers offered include Bud, Bud light, Yuengling(?), and Sam Adams. As I said above, when it comes to food, the two resorts are one. When it comes to beer...the same policy as above holds true: if something runs out, they will sometimes sub something similar. Since the theme of YC is "New England Coastal", you can expect the beers to be American. Disney has a solid history with Sam Adams.(they have a big booth at F&W.) I'm fairly confident that the beer at YC is the same as BC (those same beers are the ones they have at many of the CL - all the resorts with an American theme. To my recollection, the ones that differ are AKL and Poly. AKL has Safari Amber, as in AK.)