Bloc Session Loire Estuaire on Clmb House. Venue in Parc d'activité de la Guerche, 4 Avenue des Frères Lumière, 44250 Saint-Brevin-les-Pins, France, France. Bloc Session Loire Estuaire in Saint-Brevin-les-Pins, across the bridge from Saint-Nazaire, is a bouldering gym in the Bloc Session network,...