Many oh the "Hallenbads" in Wien are pretty small and very often crowded. If you are staying in Wien for a longer time you can buy a one-month-card for only 17 EUR and what is good is that it gives you access to all the Hallenbads in Wien. Can be a good idea to try one of the more periferal one to avoid crowds.
This user has arrived from Qype, a European company acquired by Yelp in 2012. We have integrated the two sites to bring you one great local experience.