This week, first cousins Liam LaHart and Oliver Hughes, who together own and run celebrity nightclub Lillies Bordello and the innovative Porterhouse chain of pubs, put their double act into action for 19-year-old Róisín O’Sullivan, who eventually wants to own her own bar. Cork-based Róisín hasn’t been to Dublin since she was 5, but once she has found her way to the Porterhouse she finds her feet and faces up to a series of challenges, from creating and promoting her own cocktail to giving a speech to a rowdy roomful of bearded stout fans.