You are in mood to chill after work or are looking for a spot for meeting friends or even a date? "Der Dachboden" is a rooftop bar on top of the 25 hours hotel in Vienna. They have nice snacks which are a little expensive, but the view is amazing. You can oversee the city center from the outdoor part and inside the bar is kept in industrial style.

It's a nice place to chill and if you are hungry before or after, the 24-hour  hotel also offers restaurants on the ground floor.

Here is the Google Maps link: https://maps.google.com/?cid=1303676950434313181&entry=gps.