An extensive vinegar menu is one of Marusan's quirky features: they list several pages of oddly compelling vinegar-based cocktails and soft drinks, and even the food menu has a vinegar soup section (punnily listed as "su-pu"). The atmosphere is laid back, with comfortable sofas and jazz on the stereo. All the food we tried was top-notch; our champuru stir-fry filled with lots of fresh vegetables and our tender grilled chicken set off by an excellent spinach sauce.