Two great European hotels spring to mind when saying ‘art afternoon tea’. One is Waldorf Astoria Cavallieri, above Rome, famed for its Tiepolos. The other, run since its 1997 start by very-Irish mine host Peter MacCann, is The Merrion, Dublin, where 159 priceless art works are more than enough reason for me, at least, to return to the Irish capital.