Only for a few stops though - unless you buy a ticket with the right number of zones
With OP landing at 8:30 am, a "ZVV Alle Zonen 9 Uhr Tagespass" (unlimited travel after 9:00 am) for CHF 26 will do the trick.
If the weather is nice, a "kleine Seerundfahrt" is a lovely way to relax for two hours. These have a restaurant on board as well