Foggy Bottom is a far cry from a rapidly changing neighborhood — it’s been decidedly wealthy for a couple of decades. But it wasn’t always that way. Washington Circle, a stone’s throw from the new Whole Foods, was an Irish gang crossroads in the late 1800s. Tenement dwellings, smoke stacks and slums dominated Foggy Bottom through the first half of the 20th century, when most residents lived in abject poverty. Much different from expensive homes and grocers with organic salad bars.