I'm heading to Geneva in October. The flight schedule is horrendous but I plan to make the best of a lay over in CDG. I'm in the airport from 8:00 a.m. until the next flight which departs at 3:30. From the perspective of a major chowhound, what can I do? Where could I go? Can I hop on a train to the closest arrondisement or go right to the center? Any suggestions for a wonderful early lunch or perhaps a late breakfast. Will I just be stuck with a croissant and cafe au lait which is not so bad?