We frequent this little bar when we are in Vienna. It's a very small bar in the area known as the Bermudadreieck (Bermuda Triangle), which has numerous other bars. The Ron Con Soda produces outstanding cocktails, particularly Latin American specialities such as Pina Coladas and Margaritas, but the menu shows about nineteen dozen different drinks, so take your pick. Its a funky little bar on about four levels. The service is great, and remarkably quick. It fills up quickly in the evenings after about nine o'clock. The only drawback is people smoking (the place is small enough, it is still within the Austrian legal limit to allow smoking). Otherwise - highly recommended.