When I was living in Zurich, I can state categorically that every person who worked in a restaurant was conversant in German, French and English (and probably Italian). I can't speak for the hotels beyond the bar at the Widder Hotel (which has, BTW, an excellent whisky selection), having not stayed in any there.

I did have a bit of trouble getting a PAYG mobile phone in Sihlcity, though; my German isn't very good and neither was the counter staff's English. But I wouldn't have expected English there.