Stealing hundreds of paintings from an art expert and dealer is an extremely unclever idea. The paintings were legally purchased. They are in every arts catalogue as sold by a respectable auction house. Selling them would be impossible. The whole scheme seems like a waste of time for nothing.
As Virgil passes through the glass-pane door of Night and Day café almost at the end of the movie, there is a sticker on the glass pane of the door which read "Pivnice U milosrdných" - the original Czech name of that pub.
At the restaurant which is supposed to be extremely high-end, a waiter puts down stacked plates with what can only be described as horrendous racket. He balanced the plates at an angle and almost dropped the whole structure. Not something that would or could happen in this kind of establishment. To avoid such a mishap a plate is slid onto the table from the edge so that it remains level at all times. Any noise made by plates or silverware is inadmissible in places like that. Even champagne should be opened quietly.