Although Chinatown didn't have huge skyscrapers like the rest of the city, there were still apartments located within Chinatown itself. Oftentimes it would be directly above the shop, and most of the time, owners would live there, making it easier for their work and lifestyle.
In fact, some people had turned their homes into shops and just doubled them up as a place to sleep. It was just the way of living for those who thrived here and based on a certain Reborn zombie girl's action, it didn't look like she had suggested Chinatown just because she liked the style of clothing they had.