On Saturday and Sunday, seven local breweries will lug a total of 40 different beers down to the wharf and load them onto the U.S.S. Jeremiah O’Brian, where you will be able to sample them at will while listening to an all-girl Led Zeppelin cover band. If you get hungry, you may have some ribs from Oola. Then have more beer. Does this sound like a good way to pass one or both days of the weekend? If so, buy your tickets here, and make friends with the San Francisco Brewers’ Guild. If anybody can throw a good party, we expect they can.