Have mussels and frites in vast quantities, served with your choice of 101 Belgian beers (Trappist-brewed, white, or light) by waiters dressed as monks, in a hall that could pass for a refectory in a monastery. Also eat stoemp (mashed potatoes and cabbage) with steak, Chimay-beer sausages, lobster, or roast chicken. The luxury index is low, but it's a satisfying, entertaining meal in the center of town, without breaking the bank. Tube: Covent Garden.