CHINESE food has long been a favourite of City slickers in search of (relatively) cost-effective comfort food at the weekend, particularly when there&rsquo;s no excuse to put the bill on expenses.<br /><br />So it was off to Goldfish in Hampstead last weekend for this group of well-heeled locals, who chowed down on crispy duck, wasabi prawns, Chilean sea bass, ostrich and lobster, followed by the bizarre-sounding avocado coconut icecream and banana fritters. <br /><br />Five glasses of Laurent Perrier champagne, three bottles of Chassagne Montrachet white burgundy and two of Chateau Cantenac Brown red Bordeaux later, the group were presented with a bill that was rather less painful than most, at an eminently reasonable &pound;999.50. And how refreshing to see a London service charge left to patrons&rsquo; discretion for once?