Brompton would be great for that city - nice bicycling destinations/paths connected by extensive/cheap public transport, with high population density and theft concerns. IMHO, the Brompton's ultra-compact/quick/easy fold, integrated/quick release luggage, stands upright and wheels well while folded (rack & X-roller mod) will invaluable for multi-modal transport, taking inside restaurants, and shopping-cart/baby-stroller mode is even great for grocers and malls. I can comfortably occupy a single seat in train/bus/car with a Brompton (w/rack) standing upright on my lap.