Vienna is reasonably tolerant towards LGBT+ travellers, more so than the rest of the country.
Online information (in German) can be found at www.gayboy.at, www.rainbow.at and www.gaynet.at. The Spartacus International Gay Guide, published by Bruno Gmünder (Berlin), is a good international directory of LGBT+ entertainment venues worldwide (mainly for men). Or check it out online at https://spartacus.gayguide.travel.
Since 2019, same-sex marriage has been legal in Austria.