We visited Chinatown for lunch and had a pleasant first meal in Bangkok. We ate at a small restaurant place on the street which had incredible noodles. They also agreed to make our meal vegetarian. While walking around we also ate a few snacks at the stalls like grilled banana (not the best) and bubble tea. The only issue we had was that around noon, when we visited, the place was a bit less lively with not many people. I would recommend visiting at night.