great lobby-bar, good price for value, met with clients, cosy atmosphere, typical viennese style, excellent price for value, it is actually more comeptitive than most of the other normal average coffee shops in town. Don't get scared away by the luxury and extravagant environment, just go with it, sit back, relax and enjoy your vienna coffee / cake-time. Dress-Code: casual elegant, just wear a long-pants (no hot pants, no short-pants, short arm shirts, but it is airconned anyways).
Try out some hot chocolate and a vienna guggelhupf cake, the hot chocolate actually doesn't come as hot chocolate, this is what you get:
A) a cup of warm milk
B) hot choclate in a small can
C) whipped creme on a separate plate
D) one crostini-cookie (dip it into the hot chocolate afterwards
Advantage: you can measure the amount of chocolate and whipped creme by yourself.
It is just foot-steps from the subway station Karlsplatz (U1,U2, U4), tram D, 1, 2, 61, 71, etc etc etc) and the Grand Hotel Coffee is actually directly connected to the shopping center (Ringstrassen Gallerien).
I didn't stay in their hotel, just came by and visit. If you need free wifi access, just ask the receptionist and each device will get one username and password.