I arrive at the Dublin airport at 0520 Monday and depart Connolly station at 0935. So I have 4 hours and 15 minutes to kill. Please tell me what I should do to make the most of my short stay. I'm thinking I will likely need to eat some breakfast and have some Guinness. So do I eat at the airport or perhaps near Connolly station? Can you get a Guinness that early in the morning?