I've only ever visited Caffé Vittoria during the day, when it operates as a cafe. At night it becomes more of a bar than a café, although the menus stay the same throughout the day, serving coffee, drinks, pastries and ice-cream.
Whenever I'm in Boston, which isn't very often admittedly, I always make a point of heading over to the North End and having an espresso and a pastry in Caffé Vittoria. In a world dominated by takeaway coffee and waiting at the counter to get your order, it's a delight to find an old-fashioned place with waitress service and a slice of old Italian class. It helps that the coffee is reliably good and, being an old-fashioned Italian espresso man myself, it very much hits the spot. The pastries, by the way, are divine.