I booked the whole upstairs:

Bierbeisl Hopfenstange
A-1070 Wien, Kaiserstraße 12
Friday, Oktober 6 – 8pm/20.00Uhr

U3 Zieglergasse, exit Zieglergasse and walk one block past to Kaiserstrasse and make a right. The entrance is around the corner. When you walk in through the doors make a left past the bar and then a right and walk up the stairs to the "beer tent"! We have our own room with our own music, german beer, and lots of fun.