It's Chinatown now, but was it Chinatown then? Yes, says the back of the card. But it wasn't always Chinatown. The architecture would be different.
The windows look as if they stretch high in a two-story room, but they didn't. Interior shots from other postcards show rooms with low ceilings.
Disclosure: this card was not secured at an antique store or postcard show, but was mailed to the house by the Mysterious Ank.