For the Thursday track sessions as well as the Sunday brick sessions, we run around the track on Île de Puteaux. The track was resurfaced in late 2009 so it is really nice and spongy.
For the brick sessions, we meet in the parking lot on Île de Puteaux. I (Brian) usually drive so everyone can leave sneakers and extra water in the trunk of my car. After the ride, we run around the track.
For the Tuesday and Friday morning swim sessions, we meet in the lane closest to the exterior wall at 7:15 in the Centre Aquatique de Neuilly-sur-Seine. Sablons is the closest Metro.