Emerging from the Bethnal Green tube stop, one might feel as if they had got off in Harlem instead of London.   Sad, 1960s buildings line the street, with even sadder storefronts: quality car store, low-price tyres, off license city supermarket, City Chic. It in the middle of this neglected street is Bethnal Green’s old Town Hall, unassuming, yet stately.  This 1910 Edwardian structure was built at the height of British