In GTA IV and GTA Chinatown Wars it is located at Steinway Beer Garden and Lucky Winkles. The beverage is most likely a parody of Guinness due to its Irish theme - on billboards, it is pictured next to a puffin with the slogan "Have a puff 'n' a pint", parodying Guinness' use of a toucan.
In GTA V, Blarneys is sold in Rob's Liquor, 24/7 and LTD stores. In GTA Online, a Blarneys beer hat was to became available through special crates, after the Independence Day Special was installed. However, through a glitch, it and a second hat (J's Lager) became unavailable for pick-up through normal means.