I've got a pretty large list of Zurich mosques with me which i haven't put up on my site yet. If you tell me which area you're in, i'll post back which masajid are closeby.
There is an mosque near schaffhauserplatz (Swiss Muslim Society, Weinbergstrasse 147, 8006 Zurich) with facility for iftiar... also check at www.islam.ch
Every Ramadan, I am reminded of my basic military service, which I did with many muslim servicemen during this season. Without food or water from sunrise to sundown, some made it through the course, while some had to fall out. But all of them did give it a go, in 34 degree tropical heat. Much respect! Good luck for the remaining fast!
having worked in dubai for two years, i felt it was easier then one might think and it made for a great experience to break the fast with my coworkers at one of the many iftar tents...