There are a lot of beer festivals on Long Island nowadays — but there is only one that I consider a must-attend event: the Long Island Nano Cask Festival, which is happening this Saturday, January 25 from 1-5 p.m. Hosted by Rocky Point Artisan Brewers (full disclosure: Donavan Hall, one of RPAB’s owners, used to contribute to this site), this annual event is the best way to taste what is going on with Long Island’s smallest breweries, including Barrage Brewing Company, Blind Bat Brewery, Ghost Cat Brewing, Moustache Brewing Co., Port Jeff Brewing Company, RPAB and Long Island’s beer and brewing clubs.…