Came here for after dinner drinks on Saturday evening of the Labour Day weekend. We were just walking along St. Paul when we happened upon a sign directing us to the best view of Old Montreal. A series of signs led us to a back door of Taverne Gaspar and through to the lobby of the Auberge du Vieux Port. A short elevator ride later and we found ourselves on the rooftop terrasse, where we were treated to a stunning panoramic view of Old Montreal and the St. Lawrence while we sipped on our (predictably overpriced) drinks. Price-aside though, the drinks (we ordered several of the sangrias) were excellent. My favourite was the bubbly sangria (mousseux, Pineau des Charentes, white cranberry juice), which was unique, strong, and beautifully presented.
Bottom line: An awesome place to spend a evening with friends.