Urania

Urania cafe has a nice view of donaukanal and when it gets dark you can enjoy the light-show on the UNIQUA building on the other side. They have a good espresso, the ambient is nice, but as other noted somewhat fancy. And you know, in fancy places the food is good-looking, cool, experimental, but you'll stay hungry :)

good food, but rather fancy.

Das Uraniakino hat die bequemsten Kinosessel in dieser Stadt! Das einzige Mal, als ich waehrend einer Filmvorfuehrung einschlief, war in eben diesen weichen roten Sesseln.
Ausserdem bietet das Gebaeude Vortraege und Seminare an, die beruehmte Vorfuehrung des Kasperltheaters und ist eines der Kinos, die die Viennale-Vorfuehrungen hosten.
Der Film, der mich einschlaeferte, war uebrigens "Mesmer", die Lebensgeschichte des gleichnamigen oesterr. Arztes.

The Urania is a well-known building / school / cinema, but it also contains a cafe / restaurant which is quite nice. Fancy interior, decent food, nice view.