What's the point of the app if it can't connect to the server? Scotia Bank, you should have learned from your mistakes of the previous years and supplied adequate server capacity and bandwidth.
Thankfully there were paper maps of the Nuit Blanche exhibits available, but in many instances it wasn't accurate nor provided adequate details to find the exhibits.
Scotia Bank, for the resources you have available to you, you should be embarrassed by this. Really, how much extra would it have cost to supply a few extra web servers and rent some extra bandwidth?