History[ edit ] The Ambassador Hotel is a neighborhood renovated single room occupancy building that sits on the Eastern edge of the Tenderloin. The Tenderloin took its name from an older neighborhood in New York with similar characteristics. There are several explanations of how that neighborhood was named. Some said it was a reference to the neighborhood as the "soft underbelly" analogous to the cut of meat of the city, with allusions to vice and corruption , especially graft. Another popular explanation, probably folklore, attributes the name to a New York City police captain, Alexander S.