We choose the bar, informal and great for people-watching. A succession of little dishes arrives, some first class – magnificently flaky pork puffs filled with sweet, rich meat; fat prawns wrapped in a crisp-fried tofu skin; an ethereally fluffy char siu bao (steamed pork bun). Others – lumpy, oafish scallop siu mai; xiao long bao, the famous Shanghai soup dumpling, from which no fragrant broth issues at the poke of a chopstick – are less impressive. But positives outweigh negatives: we like D’sumsquared anyway.