What will you do after retirement? Two 70-somethings sold their house in the suburbs and lived in Rome, Vienna, London and Paris for 2 years. In brief, breezy essays, they tell of European daily life, museum wanderings, of family history, as they cope with French doctors, Italian subways and, once, a Bulgarian philosopher who moonlighted to fix their computer.When friends asked, "but what did you do all day?" they replied "just what you did, only we did it in Europe."