Hi,
Just in case anyone gets split from the group: We're going to Melker Stiftskeller, the address is Schottengasse 3, 1010 Wien. The general plan is to take U3 to Stephansplatz and walk about 10 Minutes to the Restaurant.
If anyone is desperate to cut down the walking time as much as possible, the alternative is to change to U2 at Volkstheater, go to Schottentor and walk from there. The overall travel time is probably longer due to the train change.
Links: https://www.google.at/maps/place/Melker+Stiftskeller/@48.21237,16.363835,15z... http://www.melkerstiftskeller.at
Cheers, Stefan