ThirstyBear Organic Brewery celebrates its 20th Anniversary with 20 of its favorite local breweries, homegrown foot-stompin' bluegrass string band, The Brothers Comatose, and a live performance by SF Flamenco Dance Company. San Francisco's celebrated organic brewery hosts its biggest bash ever with unlimited pours of over 40 different hop bombs, sours, cask-conditioned ales, seasonals, and barrel-aged beers!

Visit www.thirstybear.com for more information!