Compared to San Francisco or New York, Baltimore's Chinatown isn't much. Just the 300 block of Park Avenue -- and even that stretch has been declining in recent years.
While several Chinese restaurants still operate in that block, some of the neighboring storefronts are boarded up. The erstwhile premises of Sony's, for example, are vacant. (That used to be the Philippine restaurant, whose owner later got into a heap of trouble over the name with the Japanese electronics giant).
In fact, a stranger happening in the area is well advised to look at the second- or third-floor levels of the modest rowhouses. Some signs there still refer to a more glorious age: On Leong Chinese Merchants Association and Kuomin Tang of China Baltimore Branch.