Zan Z Bar has a great little out front patio to have a drink or meal and people watch. It's a very plesant place to spend an hour... or two or three. The staff is very attentive and pleasant, and the food is good. But it is pricey for what it is, and without the patio and people watching, not really anything special. If your time in Saigon is limited, there are many more interesting places to go.