After a few days at Hotel Belle Juliette, a delightful and reasonably priced four-star hotel in Saint-Germain-des-Prés, we took a train to Bordeaux for our 10-day live like a local experiment. Our Airbnb was on a quiet street away from the pulsing center of the city, on a tiny cobblestone street a few blocks from the Garonne river in a classic 18th cent…