For something different, this low-cost option operated by Geneva's hotel-management school offers excellent value. Service levels are exceptional (and if they're not, dob on the students!) and the spacious rooms (many with kitchenette), studios and fully-fledged apartments are modern and spotlessly clean. To get here, take tram 15 from the station – it'll take you less than 15 minutes.
Check the website for discounts on multinight stays.