Sorell Hotel Seefeld
close to the celebration location, freshly renovated
Seegarten Hotel
neighborhood hotel, walking distance to celebration location
Boutique Hotel (B&B) NiMo -
basically across the street from celebration location
Hotel Europe -
right behind the opera, walking distance to celebration location
Motel One -
Zurich downtown, celebration location accessible by tram (number 2) or walking (no heels then ideally)
also AirBnB is available in Zurich, worth to check - and of course big hotel chains like Marriott etc are present if you want to use points. Zurich is small afterall...