Who is Kenneth O'Keefe and where does Dangerfield invite him to go in Chapter One?

Sebastian Dangerfield encounters his friend Kenneth O'Keefe, a fellow student at Trinity College, Dublin University, in a bar in Dublin. Both American students are broke, waiting for checks from the G.I. Bill. Dangerfield has just pawned an electric fire, so he buys O'Keefe a drink. Dangerfield says his wife Marion and baby Felicity have gone to her parents. They've got a creaking old house in an outlying town, and Dangerfield asks O'Keefe to visit.