The Grieder store on the Bahnhofstrasse / Paradeplatz has a nice cafe terrace on the top floor where you can pick up middle aged+ women, no sweat. Wouldn't buy the clothes there, though. Is this what you were looking for?
The Hotel Züriberg, up near the Zoo, has a great terrace with city and mountain views.
Soon enough the Dolder Hotel will reopen (designed by M'Lord Foster, zzz) and they're sure to have something whizz-bang.
My favourite is the cafe El Greco at Limmatplatz, next to the Migros building. Sun, sandwiches and easy views. Champion.
If you like the Pump House (I don't), walk a little further to the Züri Horn and try the Kiosk - you'll know it, it's multi-coloured and next to a Henry Moore sculpture. Great place for morning coffee in the sun.
The Gran Caffe on Limmatquai is kinda old-fashioned but nice location.
For the price of a coffee and Schoggi-Gipfeli, I'd be happy to show you the sights!