While the demographic probably leans towards posh in and around Dublin, I can assure you the country very much does care about rugby a great deal. I'm not its biggest fan myself, but I'm in the minority. People go absolutely mad for it over here. Following the provinces (Leinster, Munster, Ulster & Connacht) is as fervent as following the national side. Sometimes moreso. As a football fan, I'd say there could be a case made that we're a rugby nation. Rugby tends to attract a much bigger female following too, which is not insignificant in itself.