Roe & Co Distillery opened in 2019 inside the 107-year-old Guinness Power House on James's Street, converting the brick-and-girder electricity station into a working whiskey distillery and cocktail education venue. The building supplied power to the St. James's Gate Brewery from 1948 until decommissioning in 2005, its turbine halls and coal stores left intact beneath vaulted ceilings now fitted with copper pot stills and blending tanks. George Roe & Co, the original distillery that lent its name to the brand, operated on Thomas Street from 1757 to 1923 and ranked as Ireland's largest whiskey producer by the 1880s, exporting casks to London, New York, and Melbourne before Prohibition and independence-era taxes forced closure. The Dublin cocktail masterclass emerged from a collaboration between Roe & Co's head distiller and the bar team at the on-site Power House Bar, designed to translate distillery processes into home bartending techniques. Workshops teach the chemistry of dilution, the interaction between Irish whiskey's malt and grain components and citrus oils, and the function of sugar syrups in balancing wood tannins. Participants work at individual stations equipped with jiggers, Hawthorne straiers, Boston shakers, and a curated selection of Roe & Co expressions aged in bourbon and sherry casks. Each session runs forty-five minutes and yields three full-size cocktails, including variations on the Old Fashioned, the Whiskey Sour, and a house creation that incorporates seasonal ingredients sourced from Dublin markets. The Liberties location places the distillery within walking distance of Christ Church Cathedral, the Guinness Storehouse, and the medieval street grid that once housed forty working distilleries. James's Street itself served as the main western artery out of the old walled city, its cobblestones worn smooth by grain carts and barrel drays. Today the Power House Bar occupies the former turbine hall, its original steel gantries converted into mezzanine seating overlooking the distillery floor where mash tuns and fermentation vessels operate under glass partitions. The bar stocks over sixty Irish whiskeys, allowing masterclass participants to compare their workshop cocktails against professional benchmarks before leaving. The building's red-brick facade retains its industrial fenestration, and the interior preserves coal chutes, crane rails, and the original control room now repurposed as a private tasting suite.