I wonder if Daniel would have been happy about this ad which was very popular c1900s. Here is some info from Wikipedia re his connections with the licensed trade

O'Connell assisted his younger son, Daniel junior, to acquire the Phoenix Brewery in James's Street, Dublin in 1831. The brewery produced a brand known as "O'Connell's Ale" and enjoyed some popularity. By 1832, O'Connell was forced to state that he would not be a political patron of the brewing trade or his son's company, until he was no longer a member of parliament, particularly because O'Connell and Arthur Guinness were political enemies. Guinness was the "moderate" liberal candidate, O'Connell was the "radical" liberal candidate. The rivalry caused dozens of Irish firms to boycott Guinness during the 1841 Repeal election. It was at this time that Guinness was accused of supporting the "Orange system", and its beer was known as "Protestant porter". When the O'Connell family left brewing, the rights to "O'Connell Dublin Ale" was sold to John D'Arcy. The brewing business proved to be unsuccessful though, and after a few years was taken over by the manager, John Brennan, while Daniel junior embraced a political career. Brennan changed the name back to the Phoenix Brewery but continued to brew and sell O'Connell's Ale. When the Phoenix Brewery was effectively closed after being absorbed into the Guinness complex in 1909, the brewing of O'Connell's Ale was carried out by John D'Arcy and Son Ltd at the Anchor Brewery in Usher Street. In 1926, D'Arcy's ceased trading and the firm of Watkins, Jameson and Pim carried on the brewing until they too succumbed to the pressures of trying to compete with Guinness.

Daniel junior was the committee chairman of the licensed trade association of the period and gave considerable and valuable support to Daniel O'Connell in his public life. Sometime later a quarrel arose and O'Connell turned his back on the association and became a strong advocate of temperance. During the period of Fr. Matthew's total abstinence crusades many temperance rallies were held, the most notable being a huge rally held on St. Patrick's Day in 1841. Daniel O'Connell was a guest of honor at another such rally held at the Rotunda Hospital