Frequent live Indie / Alternative shows in the week, plus (free) Indie club nights Friday and Saturday. Check their homepage for listings.
Getting there: From the hostel, take the U6 U-Bahn line from Westbahnhof (direction 'Floridsdorf') four stops to Alser Straße. It's a five or so minute walk from there.
Getting back: The U6 line runs back to Westbahnhof through the night Fri & Sat. From Sun - Thurs, the last train at night is around 00:30, and the first train in the morning about 04:40. Occasional night buses run along the Gürtel to Westbahnhof station between those times, walk in about 30 mins, or uber it.