By Lucy Kenningham Is the world moving towards 24-hour alcohol licensing? Is that a good thing? This autumn Montreal will become the first Canadian city to declare itself “24 hour”. What does this mean? Aren’t all cities “24-hour”, we hear you cry, unless perhaps they are situated in a specially warped bend of space-time dimension? Well, yes. But not in terms of alcohol licensing, the most important measure out there. In Toronto venues have to close by 2am, and it is 3am in Vancouver. Over here in London, revellers of the night have it hard. Most bars and restaurants must stop serving up booze…